计算:1.(x-3y)(-6x) 化简:1.x(x-1)+2x(x+1)-3x(2x-5)
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计算:1.(x-3y)(-6x) 化简:1.x(x-1)+2x(x+1)-3x(2x-5)
计算:1.(x-3y)(-6x) 化简:1.x(x-1)+2x(x+1)-3x(2x-5)
计算:1.(x-3y)(-6x) 化简:1.x(x-1)+2x(x+1)-3x(2x-5)
1、原式=-6x^2+18xy
2、原式=x^2-x+2x^2+2x-6x^2+15x
=-3x^2+16x
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
计算:1.(x-3y)(-6x) 化简:1.x(x-1)+2x(x+1)-3x(2x-5)
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