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anonymous
 5 years ago
Solve 56x + x^3 = 15x^2 by factoring
anonymous
 5 years ago
Solve 56x + x^3 = 15x^2 by factoring

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Wouldn't it be x(56+x^2) = (I don't know the rest)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i think i got it: x(56+x^2)=15x divide by x both sides so: x(56+x^2)/x=15x/x then you get 56+x^2=15x arrange:i.e x^215x+56=0 1*56=56 8+7=15 insert:x^28x7x+56=0 x is common.... x(x8)......7(x8)=0 (x7)...(x8)=0 since (x7)=0 x=7 since (x8)=0 x=8 possible values of x are: 8 & 7

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry the division part is suppposed to be: x(56+x^2)=15x^2 then divide by x both sides you get: 56+x^2=15x the rest is ok
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