multiplying binomials in two variables

multiply

(3x-5z)(8x-z)

simplify your answer

(3x * 8x) + (3x * -z) + (-5z * 8x) + (-5z * -z)

24x^2 - 3xz - 40zx + 5z^2
24x^2 - 43xz + 5z^2