解方程 ①x²-7x-1=0 ②2x²+3x=3 ③x²-2x+1=25④(2x-5)=4x-10 ⑤x²+5x+7=3x+11 ⑥1-8x+16x²=2-8x
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![解方程 ①x²-7x-1=0 ②2x²+3x=3 ③x²-2x+1=25④(2x-5)=4x-10 ⑤x²+5x+7=3x+11 ⑥1-8x+16x²=2-8x](/uploads/image/z/437438-38-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B+%E2%91%A0x%26%23178%3B-7x-1%3D0+%E2%91%A12x%26%23178%3B%2B3x%3D3+%E2%91%A2x%26%23178%3B-2x%2B1%3D25%E2%91%A3%EF%BC%882x-5%29%3D4x-10+%E2%91%A4x%26%23178%3B%2B5x%2B7%3D3x%2B11+%E2%91%A51-8x%2B16x%26%23178%3B%3D2-8x)
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解方程 ①x²-7x-1=0 ②2x²+3x=3 ③x²-2x+1=25④(2x-5)=4x-10 ⑤x²+5x+7=3x+11 ⑥1-8x+16x²=2-8x
解方程 ①x²-7x-1=0 ②2x²+3x=3 ③x²-2x+1=25
④(2x-5)=4x-10 ⑤x²+5x+7=3x+11 ⑥1-8x+16x²=2-8x
解方程 ①x²-7x-1=0 ②2x²+3x=3 ③x²-2x+1=25④(2x-5)=4x-10 ⑤x²+5x+7=3x+11 ⑥1-8x+16x²=2-8x
1.x=2分之(7±根号53)
2.2x^2+3x-3=0
x=4分之(-3±根号33)
3.x²-2x-24=0
(x-6)(x+4)=0
x1=6,x2=-4
4.x=2.5
5.x^2+2x-4=0
x=-1±根号5
6.16x^2=1
x=±1/4