SOLUTION: 12x^3+53x^2+18x-8=0 x=4 is the root

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Question 696120: 12x^3+53x^2+18x-8=0 x=4 is the root
Answer by mathbird(71) About Me  (Show Source):
You can put this solution on YOUR website!
12x^3+53x^2+18x-8=0
12(4)^3+53(4)^2+18(4)-8=0
12*64+53*16+72-8=0
768+848+72-8
1680