Question

Solve 3x2 + 18x + 15 = 0 by completing the square.

3(x + 3)2 = 6; x = −3 + square root 2, x = −3 − square root 2
3(x + 9)2 = 12; x = −11, x = −7
3(x + 3)2 = 12; x = −5, x = −1
3(x + 9)2 = 228; x = −9 + square root 76, x = −9 − square root 76

Answer 1

3x^2 + 18x + 15 = 0
3(x^2 + 6x + 5) = 0
3(x + 3)^2 - 12 = 0
Answer choice:
c.) 3(x + 3)2 = 12; x = -5, x = -1

Answer 2

Thank you

Answer 3

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