7002546 7002546

15-08-2018
Mathematics

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solve the equation without the use of a calculator. please Help!!! Thank you!!!
-7x=x^3+8x^2

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konrad509 konrad509

15-08-2018

[tex] -7x=x^3+8x^2\\
x^3+8x^2+7x=0\\
x(x^2+8x+7)=0\\
x(x^2+x+7x+7)=0\\
x(x(x+1)+7(x+1))=0\\
x(x+7)(x+1)=0\\
x=0 \vee x=-7 \vee x=-1
[/tex]

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