A³+8b³=(a+2b)(a²-2ab+4b²
125x³-y³=(5x-y)(25x²+5xy+y²)
x^6-y^6)=(x³-y³)(x³+y³)=(x-y)(x²+xy+y²)(x+y)(x²-xy+y²(
а)(y+2)(y²-2y+4)
б)(a-1)(a²+a+1)
в)(2x+0,4y)(4x²-0,8xy+0,16y²)
г)(x²-4)(x^4+4x²+16)(x-2)(x+2)(x^4+4x+16)
а)x²-x²+9=3x
3x=9
x=3
б)4x=9
<span>x=2,25</span>