1.
а) 4x⁴•(-2x²)³=4x⁴*(-8x⁶)=-32x¹⁰
б)(3x-1)(3x+1)+(3x+1)³=(3x+1)(3x-1+(3x+1)²)
3x-1+(3x+1)²=3x-1+9x²+6x+1=9x²+9x=9x(3x+1)
(3x+1)*9x*(3x+1)=9x(3x+1)²
2.
{5x-2y=11 {5x-2y=11
{ => {
{4x-y=4 {y=4x-4
5x-2y=11
5x-2(4x-4)=11
5x-8x+8=11
3x=-3
x=-3
y=4x-4
y=-3*4-4
y=-16
3
а) 25-ab²=(5-b√a)(5+b√a)
б) 3a²-6a+3=3(a²-2a+1)=3(x-1)(x-1)=3(x-1)²