4x²-3x³-x-4+2x³+x³+9 x=1又2分之1 a-a²b+ab²+a²b-ab²+b³ a=1 b=负33(a-b)²-9(a-b)-2(a-b)²+5(a-b) a-b=2今天就要,晚了作废
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4x²-3x³-x-4+2x³+x³+9 x=1又2分之1 a-a²b+ab²+a²b-ab²+b³ a=1 b=负33(a-b)²-9(a-b)-2(a-b)²+5(a-b) a-b=2今天就要,晚了作废
4x²-3x³-x-4+2x³+x³+9 x=1又2分之
1 a-a²b+ab²+a²b-ab²+b³ a=1 b=负3
3(a-b)²-9(a-b)-2(a-b)²+5(a-b) a-b=2
今天就要,晚了作废
4x²-3x³-x-4+2x³+x³+9 x=1又2分之1 a-a²b+ab²+a²b-ab²+b³ a=1 b=负33(a-b)²-9(a-b)-2(a-b)²+5(a-b) a-b=2今天就要,晚了作废
1、先化简为4x^2-x+5
在带入x的值为4*1.5^2-1.5+5=12.5
2、化简为a+b^3
带入x、y的值1+(-3)^3=-26
3、化简为-(a-b)^2-4(a-b)
带入a-b的值得-4-4*2=-12
25/2
—26
—4
望采纳
(1) 原式=4x²-x+5=9-3/2+5=12又1/2
(2) 原式=a+b³=1-27=-26
(3)原式=(a-b)²-4(a-b)=4-8=-4