SOLUTION: i need help on finding out how to factor -x^4+1.5x^3+8x^2-1.5x-7

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Question 118485This question is from textbook Mcdougal Littell Algebra 2
: i need help on finding out how to factor -x^4+1.5x^3+8x^2-1.5x-7This question is from textbook Mcdougal Littell Algebra 2

Answer by stanbon(48564) About Me  (Show Source):
You can put this solution on YOUR website!
factor -x^4+1.5x^3+8x^2-1.5x-7
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I graphed it to find the zeroes at x = -2,-1,1,and 7/2
The factors are (x+2)(x+1)(x-1)(2x-7)
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Graph:
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-x%5E4%2B1.5x%5E3%2B8x%5E2-1.5x-7%29
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Cheers,
Stan H.