SOLUTION: whats the linear function of this equation: 7x^3-39x^2-40x+132? thank you

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Question 429403: whats the linear function of this equation: 7x^3-39x^2-40x+132? thank you
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
what are the linear factors of this polynomial:
7x^3-39x^2-40x+132
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graph%28400%2C300%2C-20%2C20%2C-150%2C150%2C7x%5E3-39x%5E2-40x%2B132%29
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Using synthetic division:
-2)....7....-39....-40....132
........7...-53.....66....|..0
Solve 7x^2-53x+66 = 0
x = [53 +- sqrt(53^2-4*7*66)]/(2*7)
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x = [53 +- sqrt(961)]/14
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x = [53+31]/14 or x = [53-31]/14
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x = [64/14] or x = [22/14]
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x = 32/7 or x = 11/7
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Zeroes are at x= -2,32/7,11/7
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Cheers,
Stan H.
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