Mathematics

4 April, 17:16

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

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