1.2345²＋2.469×0.7655＋0.7655²=?

1.2345²＋2.469×0.7655＋0.7655²=?
1.2345²＋2.469×0.7655＋0.7655²=?

1.2345²＋2.469×0.7655＋0.7655²=?
1.2345²＋2.469×0.7655＋0.7655²
=1.2345²＋2×1.2345×0.7655＋0.7655²
=(1.2345+0.7655)²
=2²
=4
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原式=1.2345^2 + 2*1.2345*0.7655+0.7655^2
=(1.2345+0.7655)^2
=2^2
=4