1) 12x^2+12y-16x-9xy = 12x(x-4)-9y(x-4) = (12x-9y)(x-4)2) -15a^2-60ab+48b+12a = -15(a^2+4a)+12(4b) = -3(5a(a+4)-4b(4))3) -24m^2-24n-16m-36mn = -8(3m^2+4m+3n-4n) = -8(3m^2+4m-3n+4n) = -8(3m(m+4)-3n(4-m))
1) 12x^2+12y-16x-9xy = 12x(x-4)-9y(x-4) = (12x-9y)(x-4)
2) -15a^2-60ab+48b+12a = -15(a^2+4a)+12(4b) = -3(5a(a+4)-4b(4))
3) -24m^2-24n-16m-36mn = -8(3m^2+4m+3n-4n) = -8(3m^2+4m-3n+4n) = -8(3m(m+4)-3n(4-m))