8x^2+x+0.3+0.3=0.8(x+_)^2+_

来源：学生作业学帮网 编辑：学帮网 时间：2024/06/24 22:05:45

8x^2+x+0.3+0.3=0.8(x+_)^2+_

0.8x^2+x+0.3
=0.8（x^2+1.25x+0.375)不好写,把小数化成分数
=8/10（x^2+10/8x+3/8)
=8/10(x^2+10/8x+25/64-25/64+24/64)
=8/10(x+5/8)^2-1/80
再画成小数就可以了

母鸡

0.8x^2+x+0.3+0.3
=0.8（x^2+5/4)+0.6
=0.8(x+5/8)²+0.6-25/64*0.8
=0.8(x+0.625)²+0.2875

8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2 x-0.3x=8 解方程 8x-5x=2x+0.3 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, 2.6x-0.1x+2*3.51=32.02 0.3x-5=0.8x-25 0.8x（3x+1）-0.3x（3x-2）=2 1,（x+0.8)*2=2.4 2,7x / 4=12+x 3,0.3x-8*0.7=0.1x1,（x+0.8)*2=2.42,7x / 4=12+x3,0.3x-8*0.7=0.1x x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? （0.3+x)*2=8 7+5x=42 1.3x-x=18.6 2分之x-1.2分之8x-16.6=0.3分之5x-0.4-x 0.3分之2x-0.6分之1.6x-3x=3分之31x+8 8x^2+x+0.3+0.3=0.8(x+_)^2+_ 8x^2+x+0.3=0.8(x+_)^2+_ 解方程.[X-0.3X-0.2(X-0.3X)-2]-0.3X=28 求解方程式,唉,把学的东西全还给老师了.0.1X+0.2(X-2)+0.3(X-4)+0.2(X-6)+0.1(X-8)+0.05(X-10)+0.05（X-12）=12.50.1X+0.2X-0.4+0.3X-1.2+0.2X-1.2+0.1X-0.8+0.05X-0.5+0.05-0.6=12.5X-4.7=12.5X=12.5+4.7X=17.2这个方程式是我们老大算 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2