1.2345²+0.7655²+2.469×0.7655

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1.2345²+0.7655²+2.469×0.7655
1.2345²+0.7655²+2.469×0.7655

1.2345²+0.7655²+2.469×0.7655
1.2345²+0.7655²+2.469×0.7655
=1.2345²+0.7655²+(2x1.2345)×0.7655
=1.2345²+2x1.2345×0.7655+0.7655²
=(1.2345+0.7655)²
=2²
=4

1.2345²+0.7655²+2.469×0.7655
=(1.2345+0.7655)^2
=2^2
=4