2(x-5)²=25-x²用因式分解法做:3x²-12x=-12 4x²-144=0 3x(x-1)=2(x-1) 2(x-1)²=(3-x)²只要x带指数都是2
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![2(x-5)²=25-x²用因式分解法做:3x²-12x=-12 4x²-144=0 3x(x-1)=2(x-1) 2(x-1)²=(3-x)²只要x带指数都是2](/uploads/image/z/1634720-32-0.jpg?t=2%28x-5%29%26%23178%3B%3D25-x%26%23178%3B%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E6%B3%95%E5%81%9A%EF%BC%9A3x%26%23178%3B-12x%3D-12+4x%26%23178%3B-144%3D0+3x%EF%BC%88x-1%EF%BC%89%3D2%EF%BC%88x-1%EF%BC%89+2%EF%BC%88x-1%EF%BC%89%26%23178%3B%3D%EF%BC%883-x%EF%BC%89%26%23178%3B%E5%8F%AA%E8%A6%81x%E5%B8%A6%E6%8C%87%E6%95%B0%E9%83%BD%E6%98%AF2)
2(x-5)²=25-x²用因式分解法做:3x²-12x=-12 4x²-144=0 3x(x-1)=2(x-1) 2(x-1)²=(3-x)²只要x带指数都是2
2(x-5)²=25-x²
用因式分解法做:3x²-12x=-12 4x²-144=0 3x(x-1)=2(x-1) 2(x-1)²=(3-x)²
只要x带指数都是2
2(x-5)²=25-x²用因式分解法做:3x²-12x=-12 4x²-144=0 3x(x-1)=2(x-1) 2(x-1)²=(3-x)²只要x带指数都是2
2(x-5)²=25-x²
2x²-20x+50=25-x²
3x²-20x+25=0
(3x-5)(x-5)=0
∴x=5/3 x=5
3x²-12x=-12
x²-4x+4=0
(x-2)²=0
∴x1=x2=2
4x²-144=0
x²-36=0
(x+6)(x-6)=0
∴x=-6 x=6
3x(x-1)=2(x-1)
3x(x-1)-2(x-1)=0
(x-1)(3x-2)=0
∴x=1 x=2/3
2(x-1)²=(3-x)²
2x²-4x+2=9-6x+x²
x²-2x-7=0
x=1+2√2 x=1-2√2