SOLUTION: How do I solve this equation?: 4x^3-104x^2+640x=1152

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Question 655282: How do I solve this equation?: 4x^3-104x^2+640x=1152
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 4x^3-104x^2+640x=1152

 x^3-26x^2+160x - 288 = 0    | x = 4, one solution

Using synthetic Divsion

4	1	-26	160	-288

 	 	  4	-88	 288

 	1	 -22	 72	  0

Results in:

        x^2 - 22 + 72 = 0

factoring

       (x-4)(x-18)= 0

Roots:  4,4,18