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Explain why (y-7)² ≠ y² - 49

Explain why (y-7)² ≠ y² - 49
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Explain why (y-7)² ≠ y² - 49

User Heath
by
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1 Answer

3 votes

Answer:

See below

Explanation:


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

Now
(y-7)(y+7)=y^2-49, but the middle term is cancelled out.

User Nerjuz
by
8.0k points
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