解方程x²-x-7/4=0 x²+3=2根号3x解方程9y²-18y-4=0
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![解方程x²-x-7/4=0 x²+3=2根号3x解方程9y²-18y-4=0](/uploads/image/z/1168311-39-1.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8Bx%26%23178%3B-x-7%2F4%3D0+x%26%23178%3B%2B3%3D2%E6%A0%B9%E5%8F%B73x%E8%A7%A3%E6%96%B9%E7%A8%8B9y%26%23178%3B-18y-4%3D0)
解方程x²-x-7/4=0 x²+3=2根号3x解方程9y²-18y-4=0
解方程x²-x-7/4=0 x²+3=2根号3x
解方程9y²-18y-4=0
解方程x²-x-7/4=0 x²+3=2根号3x解方程9y²-18y-4=0
x²-x=7/4
x²-x+1/4=7/4+1/4
(x-1/2)²=2
x-1/2=±√2
x=(1-2√2)/2,x=(1+2√2)/2
x²-2√3x+3=0
(x-√3)²=0
x--√3=0
x=√3