Question

Упростите выражение. (у-4)(у+4)-(у-3)^2 и (а+2)-(а+3)^2

Answer 1

(y-4)(y+4)-(y-3)^2=(y^2-16-(y^2-6y+9))=y^2-16-y^2+6y-9=6y-25

(a+2)-(a+3)^2=(a+2-(a^2+6y+9))=a+2-a^2-6y-9=-(a^2+7+5y)