①-12abc(3a+4b-2c)②(x-3y)(x-1/2y)③(x+2y)^2(x-2y)^2④(a-2b+c)(a+2b+c)在线的数学专家们帮帮我
问题描述:
①-12abc(3a+4b-2c)②(x-3y)(x-1/2y)③(x+2y)^2(x-2y)^2④(a-2b+c)(a+2b+c)在线的数学专家们帮帮我
答
①-12abc(3a+4b-2c)②(x-3y)(x-1/2y)③(x+2y)^2(x-2y)^2④(a-2b+c)(a+2b+c)在线的数学专家们帮帮我