Question

求:1.2345^2+2.469*0.7655+0.7655^2 用公式法

Answer 1

1.2345^2+2.469*0.7655+0.7655^2

=1.2345^2+2*1.2345*0.7655+0.7655^2

=(1.2345+0.7655)^2

=2^2

=4