Question

Помогите плиз!!!!!!!!!!!!!!!11

Answer 1

1.1) x^2+16-8x
2) 9x^2+25-30x
3)4a^2+6a-6a-9=4a^2-9
4)y^4+2y^2-2y^2-4=y^4-4
3.6ab-9b^2+a^2+9b^2-6ab=a^2=(-2/7)|^2=4/49
4.1)5*(4-9х^2y^2)=20-45x^2y^2
2)a^6-b^4
3)x^2+y^2+2xy-x^2-y^2+2xy=4xy
5. 36a^2-1-36a^2-8a=1
-1-8a=1
-8a=2
8a=-2
a=-2/8=-1/4