1) 4+4n+4n^2=
2)x^3+9x+27x+27=
3)k^3+k^2-k-1=
4)4x(y^2-9)+4x^2(y^2-9)-9+y^2=
5)(x-1)(x^2+8x+16)-6(x+4)=
6)x^2+xy+2x+2y=
РЕШИТЕ

Question

Алгебра: 1) 4+4n+4n^2= 2)x^3+9x+27x+27= 3)k^3+k^2-k-1= 4)4x(y^2-9)+4x^2(y^2-9)-9+y^2= 5)(x-1)(x^2+8x+16)-6(x+4)= 6)x^2+xy+2x+2y= РЕШИТЕ

sweetmur · Accepted Answer

X-y=2 /*3 4x+6y=0 //2
2x-3y=-1 7y-2x=20

3x-3y=6 2x+3y=0
2x-3y=-1 -2x+7y=20
x=7 10y=20
7-y=2 y=2
y=5 4x=-12
(7;5) x=-3
(-3;2)