SOLUTION: 6x^3+12x^2-15x Please help. Thank u

Question 76311This question is from textbook Understanding Elementary Algebra with Geometry
: 6x^3+12x^2-15x Please help. Thank u This question is from textbook Understanding Elementary Algebra with Geometry

Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
6X^3+12X^2-15X=0
X(6X^2+12X-15)=0
3X(2X^2+4X-5)=0
2X^2+4X-5=0 USING THE QUADRATIC EQUATION & SOLVE FOR X THUS:
X=(-4+-SQRT[4*4-4*2*-5])/2*2
X=(-4+-SQRT[16+40])/4
X=(-4+-SQRT56)/4
X=(-4+-7.48)/4
X=(-4+7.48)/4
X=3.48/4
X=-.87
X=(-4-7.48)/4
X=-11.48/4
X=-2.87 ANSWER.

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