Question 372538
Starting with:
10x^2-12y+15x-8xy
Then switching the two middle terms:
10x^2+15x-12y-8xy
Now group terms:
(10x^2+15x)-(12y+8xy) (careful with the sign change in second term)
factor each expression inside parentheses:
5x(2x+3)-4y(3+2x)
5x(2x+3)-4y(2x+3)
(2x+3)(5x-4y)