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OpenStudy (anonymous):
find the roots -x3 + 5x2 - 11x + 55 = 0
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OpenStudy (anonymous):
@jim_thompson5910 can you help me?
jimthompson5910 (jim_thompson5910):
hint: factor by grouping
OpenStudy (anonymous):
im not sure how to do that
jimthompson5910 (jim_thompson5910):
-x^3 + 5x^2 - 11x + 55 = 0 (-x^3 + 5x^2) + (-11x + 55) = 0 -x^2(x - 5) -11(x - 5) = 0 I'll let you finish up
OpenStudy (abb0t):
you could also use the fundamental theorem of algebra, using long division
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OpenStudy (anonymous):
okay I factored it then what?
jimthompson5910 (jim_thompson5910):
what did you get when you factored?
OpenStudy (anonymous):
|dw:1374693265903:dw|
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