1) у(у-1)+2(у-1) = (у-1)(у+2)
2) ах-ау+2х-2у = (ах-ау)+(2х-2у) = а(х-у)+2(х-у) = (х-у)(а+2)
3) х²-64 = х²-8² = (х-8)(х+8)
4) 9а²-16b² = (3a)²-(4b)² = (3a-4b)(3a+4b)
5) х³+у³ = (х+у)(х²-ху+у²)
6) х³+1 = (х+1)(х²-х+1)
7) m³+27 = m³+3³ = (m+3)(m³-3m+9)
8) 8+c³ = 2³+c³ = (2+c)(4-2c+c²)
9) у³ + 1/8 = у³ + (1/2)³ = (у+1/2)(у²- у/2 + 1/4)
10) 8/27 + z³ = (2/3)³+z³ = (2/3 + z)(4/9 - 2z/3 + z²)