因式分解 a²-2ab+b²-3a+3b-4
问题描述:
因式分解 a²-2ab+b²-3a+3b-4
答
a² - 2ab + b² - 3a + 3b - 4
= (a² - 2ab + b²) - (3a - 3b) - 4
= (a - b)² - 3(a - b) - 4
= (a - b + 1)(a - b - 4)