1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!

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1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!
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1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!
1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!

1.2345^2+0.7655^2+2.469*0.7655,求详细过程,谢谢!
a^2+b^2+2ab=(a+b)^2
1.2345^2+0.7655^2+2.469*0.7655=(1.2345+0.7655)^2=4