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Solve this equation using an algebraic method: (x + 4)( x - 4) = 9.

Solve this equation using an algebraic method: (x + 4)( x - 4) = 9.
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4 votes
Solve this equation using an algebraic method: (x + 4)( x - 4) = 9.

User Chris Thornton
by
8.4k points

1 Answer

1 vote
Sure!

(x+4)(x-4)=9
x^2 +4x-4x - 16 =9
x^2 -16 = 9
x^2 =25
x = -5
x = 5
User Madeline
by
8.3k points
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