1. (2-x)^2-x(x-2)=-6
4-4x+x^2-x^2+2x=-6
4-4x+2x=-6
-4x+2x=-6-4
-2x=-10
x=-10:(-2)
x=5
2. A) (7^2-2a)(2a+7^2)=(49-2a)(2a+49)=2401-4a^2
Б) (3a^2+a)^2=9a^4+6a^3+a^2
B) (2+y)^2*(2-y)^2=((2+y)*(2-y))^2=(4-y^2)^2=16-8y^2+y^4
1. (2-x)^2-x(x-2)=-6
4-4x+x^2-x^2+2x=-6
4-4x+2x=-6
-4x+2x=-6-4
-2x=-10
x=-10:(-2)
x=5
2. A) (7^2-2a)(2a+7^2)=(49-2a)(2a+49)=2401-4a^2
Б) (3a^2+a)^2=9a^4+6a^3+a^2
B) (2+y)^2*(2-y)^2=((2+y)*(2-y))^2=(4-y^2)^2=16-8y^2+y^4