解一元二次方程.哪个大神帮我
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/08 12:59:14
解一元二次方程.哪个大神帮我
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(1)36x²-1=0
x²=1/36
x=1/6 or x=-1/6
(2)4x²=81
x²=81/4
x=9/2 x=-9/2
(3)(x+5)²=25
x+5=5 x+5=-5
x=0 or x=-10
(4)x²+2x+1=4
(x+1)²=4
x+1=2 or x+1=-2
x=1 or x=-3
x²=1/36
x=1/6 or x=-1/6
(2)4x²=81
x²=81/4
x=9/2 x=-9/2
(3)(x+5)²=25
x+5=5 x+5=-5
x=0 or x=-10
(4)x²+2x+1=4
(x+1)²=4
x+1=2 or x+1=-2
x=1 or x=-3