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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
asked 40.7k views
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Solve this equation using an algebraic method: (x + 4)( x - 4) = 9

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User Mpetla
by
7.8k points

1 Answer

6 votes
(x + 4)(x - 4) = 9
x^2 - 16 = 9
x^2 = 9 + 16
x^2 = 25
x = sqrt 25
x = 5
answered
User Coryj
by
8.3k points
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