要过程.要答案.(快)
t^2-45=016x^2-49=0t^2-45=0x^2=256(6x-1)^2=25(2x-3)^2=5(x+1)^2-12=0(x-5)^2-36=0x^2-9=0...
t^2-45=0
16x^2-49=0
t^2-45=0
x^2=256
(6x-1)^2=25
(2x-3)^2=5
(x+1)^2-12=0
(x-5)^2-36=0
x^2-9=0 展开
16x^2-49=0
t^2-45=0
x^2=256
(6x-1)^2=25
(2x-3)^2=5
(x+1)^2-12=0
(x-5)^2-36=0
x^2-9=0 展开
1个回答
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t^2-45=0 , (t-3√5)(t+3√5)=0 ,t1=3√5 ,t2=-3√5
16x^2-49=0 , (4x)^2-7^2=0 . x1=7/4, x2=-7/4
t^2-45=0
x^2=256 , x=±16
(6x-1)^2=25, 6x-1=±5 , x1=1, x2=-2/3
(2x-3)^2=5 , 2x-3=±√5 ,x1=(3+√5)/2 , x2=(3-√5)/2
(x+1)^2-12=0 , (x+1-√12)(x+1+√12)=0 , x1=2√3-1 , x2=-(2√3+1)
(x-5)^2-36=0 , (x-5)=±6 ,x1=11 , x2=-1
x^2-9=0 , x1=3, x2=-3
16x^2-49=0 , (4x)^2-7^2=0 . x1=7/4, x2=-7/4
t^2-45=0
x^2=256 , x=±16
(6x-1)^2=25, 6x-1=±5 , x1=1, x2=-2/3
(2x-3)^2=5 , 2x-3=±√5 ,x1=(3+√5)/2 , x2=(3-√5)/2
(x+1)^2-12=0 , (x+1-√12)(x+1+√12)=0 , x1=2√3-1 , x2=-(2√3+1)
(x-5)^2-36=0 , (x-5)=±6 ,x1=11 , x2=-1
x^2-9=0 , x1=3, x2=-3
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