Question

Упростить вырaжение:
(y-4)(y+4)-(y-3)^2=
(a-2)(a-7)-2a(3a-5)

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-7)-2a(3a-5)=a^2-7a-2a+14-6a^2+10a=-5a^2+a+14.

Answer 2

Спасибо!

Answer 3

Vashe zadanie resheno