解方程1.x(2x+7)=3(2x+7) 2.3/2x²-4x=1 3.x(3x-4)-7=2(x²
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 13:37:06
解方程1.x(2x+7)=3(2x+7) 2.3/2x²-4x=1 3.x(3x-4)-7=2(x²-2)+2x
1.x(2x+7)=3(2x+7)
x(2x+7)-3(2x+7) =0
(2x+7)(x-3)=0
x=-7/2 x=3
2.3/2x²-4x=1
3x²-8x-2=0
x²-8x/3=2/3
x²-8x/3+16/9=2/3+16/9
(x-4/3)²=22/9
x=4/3+√22/3 x=4/3-√22/3
3.x(3x-4)-7=2(x²-2)+2x
3x²-4x-7=2x²-4+2x
x²-6x-3=0
x²-6x+9=12
(x-3)²=12
x=3+2√3 x=3-2√3
x(2x+7)-3(2x+7) =0
(2x+7)(x-3)=0
x=-7/2 x=3
2.3/2x²-4x=1
3x²-8x-2=0
x²-8x/3=2/3
x²-8x/3+16/9=2/3+16/9
(x-4/3)²=22/9
x=4/3+√22/3 x=4/3-√22/3
3.x(3x-4)-7=2(x²-2)+2x
3x²-4x-7=2x²-4+2x
x²-6x-3=0
x²-6x+9=12
(x-3)²=12
x=3+2√3 x=3-2√3
解方程(x²-x+4)x-(x-1)(x²+2)=x+7
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3
解方程(x-2)/(x-3)-(x-3)/(x-4)=(x-5)/(x-6)-(x-6)/(x-7)
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
方程(x-1/x-2)-(x-3/x-4)=(x-2/x-3)-(x-4/x-5)解为x=7/2,(1/x-7)-(1/
解方程:1.x/x+1-1=3/(x+1)(x-2) 2.3/x+2+1/x=4/x²+2x 3.2/3+x/
(x+1)(2x-3)-(x-1)(x+2)=x²+7,解方程,
解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7)
解方程:x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6
解方程4x(1-x)-(-2x+3)(2x+3)=5 解不等式(-x-1)(x-1)>7-(x-1)²