Question

(3х+у) (2х-5у) -6 (х-у)² упростить выражение

Answer 1

(3х+у) (2х-5у) -6 (х-у)² =6x²+2xy-15xy-5y²-6x²+12xy-6y²=-xy-11y²

Answer 2

(3х + у) * (2х - 5у) -6 (х - у)² = 6x² - 15xy + 2xy - 5y²-6(x² - 2xy + y²) = 6x² - 15xy + 2xy - 5y² - 6x² + 12xy - 6y² = - xy - 11y²

Answer 3

To simplify the expression, we can start by multiplying out the terms within each set of parentheses using the distributive property:

(3x + y) (2x - 5y) - 6 (x - y)²

= 6x² - 15xy + 2xy - 5y² - 6(x² - 2xy + y²) (Note: (x - y)² = (x - y)(x - y) = x² - 2xy + y²)

= 6x² - 15xy + 2xy - 5y² - 6x² + 12xy - 6y²

= -11xy - 11y²

Therefore, the simplified expression is -11xy - 11y².