Question

How do you factor `16x^{2} + 2x y - 18y^{2}`?

Answer 1

2(x-y)(8x+9y)

Explanation:

`16x^2+2xy-18y^2 = 2[8x^2+xy-9y^2]= 2[8x^2+9xy-8xy-9y^2] = 2[x(8x+9y)-y(8x+9y)] = 2(x-y)(8x+9y)`