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OpenStudy (anonymous):
x^3+3x^2-9x=27
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OpenStudy (anonymous):
x(x(x+3)-9)=27 x(x^2+3x-9)=27 (x+1)^3-12(x+1)-16=0 solution = x= 3 and x= -3
OpenStudy (anonymous):
hope it helps
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