Question

(x+3)³-(9+7x)*(7x-9) Если X=-2

Answer 1

(x+3)³-(9+7x)(7x-9)=x³+9x²+27x+27-49x²+81=x³-40x²+27x+108
x=-2
-8-40*4+27*(-2)+108=-8-160-54+108=-114

Answer 2

Y=(x+3)³-(49x²-81)
y(-2)=(3-2)³-(49*4-81)=1-115=-114