Answer:
Step-by-step explanation:
3(-1) - (-2)2 = (-1 + (-2))2 + (-2)
-3 - (-4) = (-1 - 2)2 - 2
-3 + 4 = (-3)2 - 2
1 = -6 - 2
1 = -8
Their answer is different after substitution.
3x - y2 has an answer that is 1 while (x + y)2 + y has an answer of -8.
(x + y)2 + y does not have a 3 in it like the first equation 3x - y2.
x and y are in parentheses in (x + y)2 + y and the equation 3x - y2 aren't.
