未完
一.
-8x4+3=29 2. -1-(1/2)x2=-2
二.
=-2(x-1)(x-1)-(3x^2-2x)-1
=-2(x-1)(x-1)-(3x^2-2x)-1 x=-1代入得
=-2(-2)(-2)-(3+2)-1
=-8-5-1
=-14
=5xy^2-3xy^2
=5xy^2-3xy^2
=2xy^2 x=2,y=-1代入
=2*2*1
=4
三.
2x/2-(x-1)/2=2-(x+2)/3
(x+1)/2+(x+2)/3=2
(5x+7)/6=2
x=1
(-6x-3)/6=(2x+1)/4-1
1=(2x+1)/4+(2x+1)/2
1=(2x+1)/4+(4x+2)/4
1=(6x+3)/4
x=1/6