计算 (1)(x-6)(x-3) (x+1/2)(x-1/3) (3x+2)(x+2) (4y-1)(y-5)、 (x-2)(x²+4)(x+y)(x²-xy+y²) 好的 (1)(x-6)*(x-3)(2)(x+1/2)*(x-1/3)(3)(x-1/3)*(3x+2)(4)(3x+2)*(x+2)(5)(4y-1)*(y-5)(6)(x-2)*(x²+4)

问题描述:

计算 (1)(x-6)(x-3) (x+1/2)(x-1/3) (3x+2)(x+2) (4y-1)(y-5)、 (x-2)(x²+4)
(x+y)(x²-xy+y²) 好的
(1)(x-6)*(x-3)
(2)(x+1/2)*(x-1/3)
(3)(x-1/3)*(3x+2)
(4)(3x+2)*(x+2)
(5)(4y-1)*(y-5)
(6)(x-2)*(x²+4)

(1)(x-6)*(x-3)=x²-9x+18
(2)(x+1/2)*(x-1/3)=x²-x/6-1/6
(3)(x-1/3)*(3x+2)=3x²+x-2/3
(4)(3x+2)*(x+2)=3x²+8x+4
(5)(4y-1)*(y-5)=4y²-21y+5
(6)(x-2)*(x²+4)=x³-2x²+4x-8