CPM Homework Help : CCA2 Problem 4-33

Paul states that $(a+b)^2$ is equivalent to $a^2+b^2$ . Joyce thinks that something is missing. Help Joyce show Paul that the two expressions are not equivalent. Explain using at least two different approaches: diagrams, algebra, numbers, or words.

Hint:

Try multiplying $(a+b)^2$ using a square.

More Help:

For a second approach, you could show the two expressions are not equal by substituting numbers for $a$ and $b$ .