300 - 3у² = - 3(у² - 100) = - 3(у² - 10²) = - 3(у-10)(у+10)
25х²у - 36у³ = у( (5х)² - (6у)² ) = у (5х - 6у)(5х+6у)
(m - 1)² - 121 = (m - 1)² - 11² = (m-1 - 11)(m - 1 +11) = (m-12)(m+10)
n² - 8n + 16 = n² - 2*n*4 + 4² = (n - 4)² = (n-4)(n-4)
-11x² + 22x - 11 = - 11(x² - 2x + 1) = - 11(x - 1)² = -11(x-1)(x-1)
81a⁴ - 16b⁴ = (9a²)² - (4b²)² = (9a² - 4b²)(9a² + 4b²) =
= ((3a)² - (2b)²) (9a² +4b²)= (3a -2b)(3a +2b)(9a² + 4b²)
8m² - 2m³ - 4 + m = -2m²(m - 4) + (m - 4) =(m - 4)(-2m² + 1)
25x - 25+x³ - x² = 25(x - 1) + x²(x - 1) = (x - 1)(x² + 25)