factor 18x^2y-24x^2-12y+16
Let's factorize in ℝ: 18x2y -24x2 -12y + 16
You can write the expression in factored form: 6x2·(3y -4) + 4·(-3y + 4)
The common factor (3y -4) appears, allowing us to factor again
▶Factored expression:   2·(3y -4)·(3x2 -2)