Упростите выражение (-5ab+1) * (5ab+1)

Question

Упростите выражение (-5ab+1) * (5ab+1)

Answer 1

(-5ab+1)(5ab+1)=(1-5ab)(1+5ab)=
=1²-(5ab)²=1-25a²b²

Comments

Спасибо

Answer 2

-(5аb-1)(5ab+1)
-(+5ab-1)кводрад