用配方法解方程 2x²-3x+5配方正确的是 A (x+3/2)²=15/4 x=-3/2±根号15/2B (x-3/2)²=15/4 x=3/2±根号15/2C (x+3/2)²=-15/4 原方程无解D (x+3/2)²=7/4 x=-3/2±根号7/2呃呃呃 Sorry 我打错了2
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![用配方法解方程 2x²-3x+5配方正确的是 A (x+3/2)²=15/4 x=-3/2±根号15/2B (x-3/2)²=15/4 x=3/2±根号15/2C (x+3/2)²=-15/4 原方程无解D (x+3/2)²=7/4 x=-3/2±根号7/2呃呃呃 Sorry 我打错了2](/uploads/image/z/1168310-38-0.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B+2x%26%23178%3B-3x%2B5%E9%85%8D%E6%96%B9%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AF+A+%EF%BC%88x%2B3%2F2%EF%BC%89%26%23178%3B%3D15%2F4+x%3D-3%2F2%C2%B1%E6%A0%B9%E5%8F%B715%2F2B+%EF%BC%88x-3%2F2%EF%BC%89%26%23178%3B%3D15%2F4+x%3D3%2F2%C2%B1%E6%A0%B9%E5%8F%B715%2F2C+%EF%BC%88x%2B3%2F2%EF%BC%89%26%23178%3B%3D-15%2F4+%E5%8E%9F%E6%96%B9%E7%A8%8B%E6%97%A0%E8%A7%A3D+%EF%BC%88x%2B3%2F2%EF%BC%89%26%23178%3B%3D7%2F4+x%3D-3%2F2%C2%B1%E6%A0%B9%E5%8F%B77%2F2%E5%91%83%E5%91%83%E5%91%83+Sorry+%E6%88%91%E6%89%93%E9%94%99%E4%BA%862)
用配方法解方程 2x²-3x+5配方正确的是 A (x+3/2)²=15/4 x=-3/2±根号15/2B (x-3/2)²=15/4 x=3/2±根号15/2C (x+3/2)²=-15/4 原方程无解D (x+3/2)²=7/4 x=-3/2±根号7/2呃呃呃 Sorry 我打错了2
用配方法解方程 2x²-3x+5配方正确的是 A (x+3/2)²=15/4 x=-3/2±根号15/2
B (x-3/2)²=15/4 x=3/2±根号15/2
C (x+3/2)²=-15/4 原方程无解
D (x+3/2)²=7/4 x=-3/2±根号7/2
呃呃呃 Sorry 我打错了
2x²-3=-6x
用配方法解方程 2x²-3x+5配方正确的是 A (x+3/2)²=15/4 x=-3/2±根号15/2B (x-3/2)²=15/4 x=3/2±根号15/2C (x+3/2)²=-15/4 原方程无解D (x+3/2)²=7/4 x=-3/2±根号7/2呃呃呃 Sorry 我打错了2
都不对
x²-3x/2=-5/2
x²-3x/2+9/16=-5/2+9/16
所以是(x-3/4)²=-31/16
无解