Explain why !!? Please answer!?

asked Nov 9, 2018 112k views

3 votes

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5 votes

Equality doesn't hold because expanding the left side yields

(y-7)^2=(y-7)(y-7)=y(y-7)-7(y-7)=y^2-7y-7y+49=y^2-14y+49

while the right side is missing the linear term
-14y

Aduchate answered Nov 13, 2018

7.6k points

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