Solve 32=(x-7)(x+7)

asked Nov 12, 2018 181k views

5 votes

Solve 32=(x-7)(x+7)

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6 votes

expanding

$(x-7)(x+7)=x^2-49 \\ 32= x^(2) -49 \\ x^2=81 \\ x=9 \\ Or \\ x=-9$

Zhutoulala answered Nov 13, 2018

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1 vote

32=(x+7)(x-7)
32=x^2-7x+7x-49
Add 49 both sides
81=x^2-7x+7x
Combine like terms
81=x^2
Then take to square of 81
X=9
Hope this helps good luck

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