Question

16
Solve the equation using the method of completing the square.
2:2 + 165 - 8 = 0
O A x = -2 ± 455
B. x= 2 + 416
C. x = -4 + 25
D.x = 4 + 2/5
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Answer 1

Answer:

C

Step-by-step explanation:

Problem: $2x^{2} + 16x - 8 = 0$

$2(x^{2} + 8 x) = 8\\(x^{2} + 8 x) = 4\\(x+4)^{2} = 4 + 16\\x =-4$±$\sqrt{20}$

$-4$±$\sqrt{20} =-4$±$2\sqrt{5}$