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)