计算:102²×98²

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计算:102²×98²计算:102²×98²计算:102²×98²102²×98²=[(100+2)(100-2)]^2

计算:102²×98²
计算:102²×98²

计算:102²×98²
102²×98²
=[(100+2)(100-2)]^2
=(10000-4)^2
=10000000-2*10000*4+16
=10000000-80000+16
=99920000+16
=99920016

(10000-4)²=100000000-80000+16=99920016

99920016

10404+9604=20008