X^2-5(x-5)(2x-1) (8класс)

Question

X^2-5(x-5)(2x-1)
(8класс)

Answer 1

X^2-5(x-5)(2x-1)=x^2-5 (2x^2-x-10x+5)=x^2-10x^2+5x+50x-25=-9x^2+55x-25

Answer 2

X^2-5(x-5)(2x-1)=X^2-5(2x∧2-х-10x+5)=X^2-10х∧2+5х+50х-25=-9х∧2+55х-25