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# Algebra - Are my answers correct? Part 2 watch

1. ( 5x +2 ) 2

= ( 5x + 2 ) (5x +2 )

= (5x * 5x) + (5x * 2) + (2 * 5x) + (2 * 2)

= (25x2) + (10x) + (10x) + (4)

= 25x2 + 20x + 4
2. (Original post by the bear)
for a rectangle you multiply the long side by the short side.

for a square the long side and the short side are the same length.
(Original post by RDKGames)
That is not how area is calculated. Area has units like which means that you multiply a length by some other length (hence length squared like cm squared). If you were to multiply length by itself 4 times, like , then you would end up with something different that is .

Anyway, the area of a square (or just any rectangle in general) is calculated by multiplying the length of the shape by its width.
Ok I think I got it.

The only thing is about this bit "Find an expression for the area" what does find an expression mean?
3. (Original post by Maths_English)
Ok I think I got it.

The only thing is about this bit "Find an expression for the area" what does find an expression mean?
Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
Meaning that you want to give the area in terms of here.
4. (Original post by RDKGames)
Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
Meaning that you want to give the area in terms of here.
Ok so the answer should be 25x^2 + 20x + 4 correct?
5. (Original post by Maths_English)
Ok so the answer should be 25x^2 + 20x + 4 correct?
Yep.

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The text passage contains a discussion about algebra, specifically the expansion of a binomial expression and a question about finding an expression for the area of a square. There is a mathematical question and an answer provided.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
You are Here: Home >< Maths

# Algebra - Are my answers correct? Part 2 watch

1. ( 5x +2 ) 2

= ( 5x + 2 ) (5x +2 )

= (5x * 5x) + (5x * 2) + (2 * 5x) + (2 * 2)

= (25x2) + (10x) + (10x) + (4)

= 25x2 + 20x + 4
2. (Original post by the bear)
for a rectangle you multiply the long side by the short side.

for a square the long side and the short side are the same length.
(Original post by RDKGames)
That is not how area is calculated. Area has units like which means that you multiply a length by some other length (hence length squared like cm squared). If you were to multiply length by itself 4 times, like , then you would end up with something different that is .

Anyway, the area of a square (or just any rectangle in general) is calculated by multiplying the length of the shape by its width.
Ok I think I got it.

The only thing is about this bit "Find an expression for the area" what does find an expression mean?
3. (Original post by Maths_English)
Ok I think I got it.

The only thing is about this bit "Find an expression for the area" what does find an expression mean?
Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
Meaning that you want to give the area in terms of here.
4. (Original post by RDKGames)
Expression is something like or , so something that is not completely determined like saying the area is 1 or 10.
Meaning that you want to give the area in terms of here.
Ok so the answer should be 25x^2 + 20x + 4 correct?
5. (Original post by Maths_English)
Ok so the answer should be 25x^2 + 20x + 4 correct?
Yep.

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: March 9, 2018
Today on TSR

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 2,788

students online now

Exam discussions

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE
user
The text passage contains a discussion about algebra, specifically the expansion of a binomial expression and a question about finding an expression for the area of a square. There is a mathematical question and an answer provided.

TYPE: SINGLE_QUESTION_WITH_ANSWER