几道数学计算的化简题
几道数学计算的化简题
(1)(√2+1)(√2-1);
(2)√32÷√2
(1)(√2+1)(√2-1);
(2)√32÷√2
数学人气:413 ℃时间:2020-04-07 20:09:50
优质解答
(1)
(√2+1)(√2-1)
=(√2)²-1²
=2-1
=1
(2)
√32÷√2
=√(16×2)÷√2
=√(4²×2)÷√2
=4√2÷√2
=4
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