解方程组:2/2a=1 (4ac-b²)/4a=-42/2a=1(4ac-b²)/4a=-4
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解方程组:2/2a=1(4ac-b²)/4a=-42/2a=1(4ac-b²)/4a=-4解方程组:2/2a=1(4ac-b²)/4a=-42/2a=1(4ac-b
解方程组:2/2a=1 (4ac-b²)/4a=-42/2a=1(4ac-b²)/4a=-4
解方程组:2/2a=1 (4ac-b²)/4a=-4
2/2a=1
(4ac-b²)/4a=-4
解方程组:2/2a=1 (4ac-b²)/4a=-42/2a=1(4ac-b²)/4a=-4
题目不对,没法解,少个方程式