1) 4x * y+2 = 2 * y+2 = 2
y²-4 2x⁴ (y-2)(y+2) x³ x³(y-2)
2) m²-1 : 2m+2 =(m-1)(m+1) * m² = m(m-1) =m²-m
m m² m 2(m+1) 2 2
3) 1 * (a³-b³) =(a-b)(a²+ab+b²) =a²+ab+b² =a² + ab + b² =a+b+b²
a²-ab a(a-b) a a a a a
4) (a³+1) * a-1 =(a+1)(a²-a+1)(a-1)=(a+1)(a-1)=a²-1
a²-a+1 a²-a+1