SOLUTION: Im having trouble understanding this one could you explain how to get the answer please?:
A rectangle has area of x^2+3x-18 and width x-3 find the factor for the length
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-> SOLUTION: Im having trouble understanding this one could you explain how to get the answer please?:
A rectangle has area of x^2+3x-18 and width x-3 find the factor for the length
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Question 284109: Im having trouble understanding this one could you explain how to get the answer please?:
A rectangle has area of x^2+3x-18 and width x-3 find the factor for the length Found 2 solutions by richwmiller, oberobic:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! You either have to factor x^2+3x-18 into (x-3) and something else or you have to divide x^2+3x-18 by (x-3)
Since we have -18 (-3*6=-18) I would guess (x+6) is the other factor.
Use foil to multiply (x-3)*(x+6) to verify.
You can put this solution on YOUR website!
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Since
We can rearrange to say that ,
which suggests you divide A/W (that is, polynomial division).
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But you may be able to factor the equation to advantage.
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So substituting what we know
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Which means
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Done
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