因式分解(1)2x^2+11x+15 (2)12x^2-7x+1 (3) 12x^2-4x-1
问题描述:
因式分解(1)2x^2+11x+15 (2)12x^2-7x+1 (3) 12x^2-4x-1
答
(1)2x^2+11x+15
=(x+3)(2x+5)
(2)12x^2-7x+1
=(3x-1)(4x-1)
(3) 12x^2-4x-1
=(2x-1)(6x+1)