因式分解(1)(4x-3)(5x^2-4x+7) (2)(3a-2)(a-1)+(a+1)(a+2)
问题描述:
因式分解(1)(4x-3)(5x^2-4x+7) (2)(3a-2)(a-1)+(a+1)(a+2)
答
(1)(4x-3)(5x^2-4x+7)=20x³-15x²-16x²+12x+28x-21=20x³-31x²+40x-21(2)(3a-2)(a-1)+(a+1)(a+2)=3a²-2a-3a+2+a³+3a+2=4a²-2a+4