1. 1) (4-х)^2=16-8x+x^2
2) (13x+2)^2=169x^2+52x+4
2. -4(5x-1)^2=-4(25x^2-10x+1)=-100x^2+40x-4
3. x^2-(x+2)^2=1
x^2-(x^2+4x+4)=1
-4x=5
x=-1.25
Объяснение:
1. 1) (4-х)^2=16-8x+x^2
2) (13x+2)^2=169x^2+52x+4
2. -4(5x-1)^2=-4(25x^2-10x+1)=-100x^2+40x-4
3. x^2-(x+2)^2=1
x^2-(x^2+4x+4)=1
-4x=5
x=-1.25
Объяснение: