Please do not give the full answer! I just need some guidance

Consider the two expressions $(x + y)^2$ and $x^2 + y^2$. Grogg thinks that these two expressions are equal for all real numbers $x$ and $y,$ but Lizzie disagrees! Let's get to the bottom of it. a) Evaluate $(x + y)^2$ and $x^2 + y^2$ when $x = 5$ and $y = 12.$ b) For which values of $x$ and $y$ does $(x + y)^2$ equal $x^2 + y^2?$ For which values of $x$ and $y$ does $(x + y)^2$ not equal $x^2 + y^2?$

BigBoiChungus Jun 29, 2021

#1**+1 **

For (a) simply substitute the values x = 5 and y = 12 into both expressions and calculate the results.

For (b) set (x+y)^{2} = x^{2} + y^{2} then expand the left hand side and simplify the resulting equation. You will then have a condition that must be satisfied for the two ex[ressions to be equal.

Alan Jun 29, 2021