(у²-2а) (2а+у²)=у⁴-4а²
(3х²+х)²=9х⁴+6х³+х²
(2+m)² (2-m)² =((2-m)(2+m))²=(4-m²)²=16-8m²+m⁴
4х²y² - 9а⁴=(2ху-3а²)(2ху+3а²)
25а² - (а+3)²=(5а+а+3)(5а-а-3)=(6а+3)(4а-3)=3(2а+1)(4а-3)
27m³ + n³=(3m+n)(9m²-3mn+n²)
(у²-2а) (2а+у²)=у⁴-4а²
(3х²+х)²=9х⁴+6х³+х²
(2+m)² (2-m)² =((2-m)(2+m))²=(4-m²)²=16-8m²+m⁴
4х²y² - 9а⁴=(2ху-3а²)(2ху+3а²)
25а² - (а+3)²=(5а+а+3)(5а-а-3)=(6а+3)(4а-3)=3(2а+1)(4а-3)
27m³ + n³=(3m+n)(9m²-3mn+n²)