解方程:(1-3x)平方+(2x-1)平方=13(x-1)(x+1)
问题描述:
解方程:(1-3x)平方+(2x-1)平方=13(x-1)(x+1)
答
1-6X+9X*X+4X*X-4X+1=13X*X-13
13X*X-10X+2=13X*X-13
10X=15
X=3/2
答
(1-3x)^2+(2x-1)^2=13(x-1)(x+1)
1-6x+9x^2+4x^2-4x+1=13x^2-13
10x=-15
x=3/2
答
(1-3x)²+(2x-1)²=13(x-1)(x+1)
1-6x+9x²+4x²-4x+1=13x²-13
-10x+2=-13
10x=15
x=3/2