SOLUTION: Please help me solve this and explain it. thank you! {{{ (x+2y)(_)=x^3+8y^3 }}}

SOLUTION: Please help me solve this and explain it. thank you! {{{ (x+2y)(_)=x^3+8y^3 }}}

Algebra.Com

Question 1007753: Please help me solve this and explain it. thank you!

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
You can either do polynomial long division to find the factor,

or you can recognize that this is the sum of two cubes.

So then,

Then,

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