Объяснение:
a) c³-4c = c(c²-4)= c(c-4)(c+4)
б) x²-2ax+a² = (x-a)(x-a)
(x²+2x)²-x²(x-1)(x+1)+2x(3-2x²) = x⁴+4x³ +4x²-x²(x²-1) + 6x-4x³ = x⁴ +4x²-x⁴+x² = 5x²
a)16-1/81a⁴ = (4- 1/9a²)(4+1/9a²) = (2-1/3a)(2+1/3a)(4+1/9a²)
б)a+a²-y-y² = (a-y) + (a²-y²) = (a-y) + (a-y)(a+y) = (a-y)(a+y+1)
Объяснение:
a) c³-4c = c(c²-4)= c(c-4)(c+4)
б) x²-2ax+a² = (x-a)(x-a)
(x²+2x)²-x²(x-1)(x+1)+2x(3-2x²) = x⁴+4x³ +4x²-x²(x²-1) + 6x-4x³ = x⁴ +4x²-x⁴+x² = 5x²
a)16-1/81a⁴ = (4- 1/9a²)(4+1/9a²) = (2-1/3a)(2+1/3a)(4+1/9a²)
б)a+a²-y-y² = (a-y) + (a²-y²) = (a-y) + (a-y)(a+y) = (a-y)(a+y+1)