# How do you factor #6x^2 +5xy -21y^2#?

##### 1 Answer

May 30, 2016

(2x - 3y)(3x + 7y)

#### Explanation:

Use the new AC Method (Socratic Search)

Consider x as a variable, y as a constant, and factor f(x).

Converted trinomial

p' and q' have opposite signs because ac < 0.

Factor pairs of

Back to f(x) -->

Factored form :