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What is x cubed plus 3x squared minus 22x minus 90 divided by x minus 5 giving a reason why your answer is correct?
Wiki User
∙ 12y ago
x3+3x2-22x-90 divided by x-5 equals x2+8x+18
For the answer to be correct then the quotient multiplied by the divisor must be equal to the dividend.
Hence:-
(x-5)*(x2+8x+18)
Multiplying out the brackets term by term:
x3-5x2+8x2-40x+18x-90
Collecting like terms in descending order:
x3+3x2-22x-90
So the answer is correct.
Wiki User
∙ 12y ago
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