用因式分解法解下列方程1.3(x-5)^2=25-x^2.

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用因式分解法解下列方程1.3(x-5)^2=25-x^2.
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用因式分解法解下列方程1.3(x-5)^2=25-x^2.
用因式分解法解下列方程1.3(x-5)^2=25-x^2.

用因式分解法解下列方程1.3(x-5)^2=25-x^2.
1.3(x-5)^2=(5+x)(5-x)
1.3(x-5)^2-(5+x)(5-x)=0
(x-5)(1.3(x-5)+1)=0
x-5=0或1.3(x-5)+1=0
x=5 x=55/13

32.5 - 13x + 1.3 x^2 = 25 - x^2
(x-5)(x-15/23)=0
x=5 x=15/23

13(x-5)*2=25-x*2
13(x-5)*2=(5+x)(5-x)
13x-65=-5-x
14x=60
x=30/7