(а³-3)²(а³+3)-а^9=(а³-3)(а^6-9)-а^9=а^9-3а^6-9а³+27-а^9=-3а^6-9а³+27=-3(а^6+3а³+9)
39+(4х+3)^2=2+4(2х+1)^2
39 + 16x^2 + 24x + 9 = 2 + 4(4x^2 + 4x + 1)
48 + 16x^2 + 24x = 2 + 16x^2 + 8x + 2
48 - 2 - 2 = 16x^2 - 16x^2 + 8x - 24x
44 = -16x
11 = -4x
x = -11/4
x = 2 3/4
А) =x^2-3x-5x+15=x(x-3)-5(x-3)=(x-3)(x-5)
б) =x^2+x+2x+2=x(x+1)+2(x+1)=(x+1)(x+2)
в) =x^2-2x-3x+6=x(x-2)-3(x-2)=(x-2)(x-3)
г) =x^2+3x+5x+15=x(x+3)+5(x+3)=(x+3)(x+5)
д) =p(x+y)-5(x+y)=(x+y)(p-5)
е) =-(n-m)+(n-m)y=(n-m)(-1+y)=(n-m)(y-1)
ж) =6x+42+xy+7y=6(x+7)+y(x+7)=(x+7)(6+y)
Производная = 2x-2/x^2
2*(-2)-2/4=-4-0.5= -4.5
С неба с неба с неба с неба