Solve the following quadratic equation: (x + 3)2 = 16. A. x = -3, -4 B. x = 1 C. x = -1, 7 D. x = 1, -7
(x + 3)^2 = 16 ; (x + 3)(x + 3) = 16 ; x^2 + 3x + 3x + 9 = 16 ; x^2 + 6x + 9 = 16 ; x^2 + 6x + 9 - 16 = 0 ; x^2 + 6x - 7 = 0 ; (x - 1)(x + 7) = 0 ; x - 1 = 0 ; x = 1 ; x + 7 = 0 ; x = -7 ; Solution set: x = 1, -7
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Question
Updated 6/8/2018 6:18:25 PM
Rating
8
(x + 3)^2 = 16 ;
(x + 3)(x + 3) = 16 ;
x^2 + 3x + 3x + 9 = 16 ;
x^2 + 6x + 9 = 16 ;
x^2 + 6x + 9 - 16 = 0 ;
x^2 + 6x - 7 = 0 ;
(x - 1)(x + 7) = 0 ;
x - 1 = 0 ;
x = 1 ;
x + 7 = 0 ;
x = -7 ;
Solution set: x = 1, -7

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