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Let's take a look at  $(x + y)^2$ and $x^2 + y^2$ . While Beeker believes that these two expressions are equal for all real numbers  $x$and  $y,$Clod believes they are not! Let's get to the bottom of this!

a) Evaluate  $(x + y)^2$ and $x^2 + y^2$  for x = 7 and y = 11

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 $x^2 + y^2?$

 Jun 17, 2024

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