# Math Help - Factorising

1. ## Factorising

Factorise:

15x-10xy+12-8y

2. Hello, Mr Rayon!

Factor: . $15x-10xy+12-8y$
Are you familiar with "factor by grouping"?

Factor in pairs: . $5x(3 - 2y) + 4(3 - 2y)$
. . . . . . . . . . . . . . . $\uparrow\qquad\qquad\quad\uparrow$
. . . . . . . . . . . . . .
a common factor

Factor it out: . $(3 - 2y)(5x + 4)$