Объяснение:
(xy²-8y)²-25y²=(xy²-8y-5y)(xy²-8y+5y)=(xy²-13y)(xy²-3y)=y(xy-13)(xy-3)
a²-b²-a+b=(a-b)(a+b)-(a-b)=(a-b)(a+b-1)
x⁶-8=(x²-2)(x⁴+2x²+4)
(ab²-5b)²-16b²=(ab²-5b-4b)(ab²-5b+4b)=(ab²-9b)(ab²-b)=b(ab-9)(ab-1)
x²-y²-5x-5y=(x-y)(x+y)-5(x+y)=(x+y)(x-y-5)
27-x³=(3-x)(9+3x+x²)
