SOLUTION: 3d-7 - 3d-2 _____ _____ 2d

SOLUTION: 3d-7 - 3d-2 _ _ 2d - 3d squared

Question 29636: 3d-7 - 3d-2
_____ _____
2d - 3d squared
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
I am reading this problem as ....

cross multiply

distribute

move everything to the left

combine like terms

since the power is cubed, there will be 3 solutions.
for the first, factor out a d

the first solution is d=0
the trinomial can not be factored. Use the quadratic formula to solve.

a = 9
b = -27
c = 4
substitute these numbers into the equation

simplify

simplify again

root out 585
585 = 3*3*5*13

the + and - make for the 2 other solutions.

reduce all cofficients by dividing each by 3

Those are your 3 answers

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