yi dao pu tong shu xue tia-b=10 ab=7 求a=?b=?

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yi dao pu tong shu xue tia-b=10 ab=7 求a=?b=?
yi dao pu tong shu xue ti
a-b=10 ab=7 求a=?b=?

yi dao pu tong shu xue tia-b=10 ab=7 求a=?b=?
a1=5+4*2^0.5,b1=-5+4*2^0.5
a2=5-4*2^0.5,b2=-5-4*2^0.5;

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