Question

Упростите

(5y-3)^2-(2-5y)

Answer 1

$(5y-3)^2-(2-5y) \ 25y^2-30y+9-2+5y \ 25y^2-25y+7$

Answer 2

(5y-3)^2-(2-5y)=

(5y)^2-2*5y*3+3^2-2+5y=

=25y^2-30y+9-2+5y=

=25y^2-25y+7