a) 2a³ - 54 = 2(a³ - 27) = 2(a-3)(a²+3a+9)
По формуле a³-b³=(a-b)(a²+ab+b²)
b) a² - 2ax + x² + 4a - 4x = (a-x)² + 4(a-x) = (a-x)(a-x+4)
a) 2a³ - 54 = 2(a³ - 27) = 2(a-3)(a²+3a+9)
По формуле a³-b³=(a-b)(a²+ab+b²)
b) a² - 2ax + x² + 4a - 4x = (a-x)² + 4(a-x) = (a-x)(a-x+4)