### Home > CCA2 > Chapter Ch4 > Lesson 4.1.2 > Problem4-33

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.

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

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