Question

3x(2y-x)-(4y-x)×y-7xy

Answer 1

3x(2y-x)-(4y-x)×y-7xy=6ху-3х²-4у²+ху-7ху=-3х²-4у²

Answer 2

Let's simplify the expression step by step:

3x(2y - x) - (4y - x) × y - 7xy

Step 1: Simplify the expression within parentheses. 3x(2y - x) - (4y - x) × y - 7xy = 3x(2y) - 3x(x) - (4y - x) × y - 7xy = 6xy - 3x^2 - (4y - x) × y - 7xy

Step 2: Expand the expression (4y - x) × y. = 6xy - 3x^2 - (4y^2 - xy) - 7xy = 6xy - 3x^2 - 4y^2 + xy - 7xy

Step 3: Combine like terms. = (6xy - 7xy + xy) - 3x^2 - 4y^2 = 0xy - 3x^2 - 4y^2 = -3x^2 - 4y^2

Therefore, the simplified expression is -3x^2 - 4y^2.