问题描述:
(1)x²+4x-3=0 (2)x²+2x-1=0 (3)x²-6x+1=0 (4)x²-4x-5
(1)x²+4x-3=0
(2)x²+2x-1=0
(3)x²-6x+1=0
(4)x²-4x-5=0
(1)x²+4x-3=0
(2)x²+2x-1=0
(3)x²-6x+1=0
(4)x²-4x-5=0
问题解答:
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