3x^2+3x-27 First take out the 3
3(x^2 + x - 9) now factor I do not see a way other than the quadratic equation
a = 1, b = 1, c = -9
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x = -b ± √ b^{2} – 4ac
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2a
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x = -1 ± √ 1^{2} – 4*1*-9
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2*1
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x = -1 ± √ 1 + 36
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2
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x = -1 ± √ 37
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2
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x = -1/2 ± √37/2