作业帮14x2.5+2.5x(11.28+2.72)怎样简便就怎样计算
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14x2.5+2.5x(11.28+2.72)怎样简便就怎样计算
14x2.5+2.5x(11.28+2.72)怎样简便就怎样计算
14x2.5+2.5x(11.28+2.72)怎样简便就怎样计算
14x2.5+2.5x(11.28+2.72)
=14x2.5+2.5x14
=2x2.5x14
=5x14
=70
14x2.5+2.5x(11.28+2.72)
=14x2.5+2.5x14
=2x2.5x14
=5x14
=70
(x2+5x+5)/(x2+5x+6)-(x2+8x+14)/(x2+8x+15)化简
5(x2-x)=3(x2+x)
14x2.5+2.5x(11.28+2.72)怎样简便就怎样计算
2.5X2+5X=37
x2-x+14因式分解
x2-x+14因式分解
x2-5x+6
x2-5x+6
x2-5x+8
3x2+5x
不等式(x2-4x-5)(x2-8)
x2-1/x2-5x+6
(1-x2)(x2-4x+5)
不等式（x2-4x-5)(x2+1)
x2-5x+1=0则x2+x2/1
5x2—[x2+(4x—x2)—2(x2—3x)]
几道数学题,解不等式X2-4X-5≤0-2X2+3X-2＜0-X2+8X-3＞04X2-18X+81/4＞01/2X2-3X+5＜03X2-2X+1＜0X2+2X-3≤0X-X2+6＜04X2+4X+1≥0-4+X-X2＜03X2-4＜02X-X2≥-14-X2≤0（X-A）（X-2）＜0
计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2