a-b=√3,b-c=√2,a+c=√3-√2,则a²-b²=
人气：126 ℃ 时间：2020-01-30 02:45:41
解答
a-b=√3,----(1)
b-c=√2,----(2)
a+c=√3-√2----(3)(
1)+(2)+(3),2a=2√3,a=√3
√3-b=√3,b=0
a²-b²=(√3)²-0=3
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