若代数式x²-6x+b可化为(x-a)²-1则b-a的值是?若非零实数满足a,b那a²=ab-1/4b²则b/a=?
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![若代数式x²-6x+b可化为(x-a)²-1则b-a的值是?若非零实数满足a,b那a²=ab-1/4b²则b/a=?](/uploads/image/z/1979004-12-4.jpg?t=%E8%8B%A5%E4%BB%A3%E6%95%B0%E5%BC%8Fx%26%23178%3B-6x%2Bb%E5%8F%AF%E5%8C%96%E4%B8%BA%EF%BC%88x-a%EF%BC%89%26%23178%3B-1%E5%88%99b-a%E7%9A%84%E5%80%BC%E6%98%AF%3F%E8%8B%A5%E9%9D%9E%E9%9B%B6%E5%AE%9E%E6%95%B0%E6%BB%A1%E8%B6%B3a%2Cb%E9%82%A3a%26%23178%3B%3Dab-1%2F4b%26%23178%3B%E5%88%99b%2Fa%3D%3F)
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若代数式x²-6x+b可化为(x-a)²-1则b-a的值是?若非零实数满足a,b那a²=ab-1/4b²则b/a=?
若代数式x²-6x+b可化为(x-a)²-1则b-a的值是?若非零实数满足a,b那a²=ab-1/4b²
则b/a=?
若代数式x²-6x+b可化为(x-a)²-1则b-a的值是?若非零实数满足a,b那a²=ab-1/4b²则b/a=?
x²-6x+b
=(x-3)²+b-9
b-9=-1
b=8
a=3
b-a=8-3=5
a²=ab-1/4b²
a²-ab+1/4b²=0
(a-1/2b)²=0
a=1/2b
b/a=2