Question 882935: If (x+2) & (x-1) are factors of (x3 +10x2 + m x +n) find the value m&n.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! If (x+2) & (x-1) are factors of (x3 +10x2 + m x +n) find the value m&n.
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If x+2 is a factor, x = -2 is a solution:
(-2)^3 + 10(-2)^2 + mn = 0
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If x-1 is a factor, x = 1 is a solution:
1^3 + 10(1)^2 + mn = 0
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Equations:
-8 + 40 = -mn
1 + 10 = -mn
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mn = -32
mn = -11
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Note:: I must be mistaken in my interpretation of your problem.
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Cheers,
Stan H.
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