Question

Только 258,263,267!Срочно!35 баллов!

Answer 1

$1)32a-2(a+8)^2=2(16a-(a+8)^2) \ 2)(-8x+5y)^2-16x(-8x-5y)=25y^2-80xy+64x^2+128x^2+80xy \ =25y^2+192x^2 \ 3)y(-7y+6x)-(-3x-y)^2=-7y^2+6xy-(9x^2+6xy+y^2)=-7y^2 \ +6xy-9x^2-6xy-y^2=-8y^2-9x^2$