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Mathematics 22 Online
OpenStudy (anonymous):

Can someone help me solve this please? 4x^3+12x^2-40x=0

OpenStudy (studygurl14):

First, factor out 4x

OpenStudy (anonymous):

Okay.

OpenStudy (studygurl14):

Tell me what you get.

OpenStudy (anonymous):

4x(-10+3x+x^2)

OpenStudy (studygurl14):

Yes, now factor (x^2 + 3x - 10)

OpenStudy (anonymous):

x+5 x-2

OpenStudy (mathstudent55):

Your factoring is correct. Now you have 4x(x + 5)(x - 2) = 0 Set each factor equal to zero and solve each equation.

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