How do you factor the expression $125x^3 + 343y^3$ ?

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Answer 1 · 2015-12-10T03:06:17

Factor: $125x^3 + 343y^3$

Ans: $(5x + 7y)(25x^2 - 35x + 49y^2)$

Use the algebraic identity: $a^3 + b^3 = (a + b)(a^2 - ab + b^2)$
$125x^3 + 343y^3 = (5x + 7y)(25x^2 - 35xy + 49y^2)$

How do you factor the expression 125x^3 + 343y^3125x^3 + 343y^3?