(5x-y)(x-y) distribusikan

(5x-y)(x-y)= 5x²-5xy-xy+y²
                 = 5x²-4xy+y²

(5x - y)(x - y)
=(5x)(x - y) + (-y)(x - y)
=(5x)(x) + (5x)(-y) + (-y)(x) + (-y)(-y)
= 5x^2 + (-5xy) + (-xy) + y^2
= 5x^2 - 6xy + y^2

Semoga membantu