x raise to 2 + 3 x -18
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Answer: x = 3 or x = -6
x² + 3x - 18 = 0
I've used quadratic formula
x=−b±√b2−4ac
2a
x=−(3)±√(3)2−4(1)(−18)
2(1)
x=−3±√81
2
x=3 or x=−6