(m⁶)²
(n³)²
(3ab²)²
(4x³y⁵)²
1.у^2(y^4-2y^2+3) 2.2x(x^2-7x+9) 3.a(x-y)(a-b)
Cos2a-2cosa+1=0
1-2sin^2a-2cosa+1=0
1-2sin^2a-2cosa+sin^2+cos^2a=0
1-sin^2a-2cosa+1-sin^2a=0
2-2sin^2a-2cosa=0
1-sin^2-cosa=0
cos^2a-cosa=0
cosa(cosa-1)=0
cosa=0
cosa=1
a=0
a=п/2
<span>X</span>²<span>y-x+xy</span>²<span>-y = x(xy-1)+y(xy-1) = (xy-1)(x+y).</span>