(2x+300)(x-4)-2(x+2)(x-3)
2个回答
原式=(2x²-8x+300x-1200)-2(x²-x-6)
=2x²+292x-1200-2x²+2x+12
=294x-1188
相关问题
3/10(200+x)-2/10(300-x)=300*4/25
解方程1/7【2x+14】=4-2x,3/10【200+x】-2/10【300-x】=300乘9/25
4x+2(10-x)≥300
3/10×﹙200+x﹚-2/10×﹙300-x﹚=300×9/25 5/12x-x/4=1/3 2/3-8x=3-1/
x1+5x2+2x3-4x4=3 -3x1-2x2+3x3+4x4=-6 -x1+3x2-x3-4x4=-2 -2x1+
3(x+2)/x-3+ x+3/x-2=4 1/x+1 + 2x/x+1=2 5x/x+2 + 3/x^2+4x+4=5
(x1-x2+4x3-2x4=0;x1-x2-x3+2x4=0;3x1+x2+7x3-2x4=0;x1-3x2-12x3
解线性方程组(1)2x1-x2+x3-2x4=7 (2)x1+2x2-3x3=-4 (3)-x1-x2+x3+4x4=4
(x+2)(x^2-4x+4)-(-x)^2*(-2x^2y)+2x(x^6y^3-1)3(2x^2+5x-4)-2(3
.解线性方程组|X1+X2+X3+X4=5 |X1+2X2-X3+4X4=-2 |2X1-3X2-X3-5X4=-2 |