Question

1)(2х+5)^2=
2)(4х+7)(7-4х)=
3)у-(3у+12)=4(2у-3)=
помогите срочно

Answer 1

1) 4х²+20х+25
2)49-16х²
3)у-(3у+12)=4(2у-3)
у-3у-12=8у-12
-2у-12=8у-12
-10у=0
у=0