Tính nhanh 25^2+50.75+75^2

2 câu trả lời

`25^2+50.75+75^2`

`= 625 + 50.75 + 75.75`

`=625 + 75 . (50 + 75)`

`= 125.5 + 75.125`

`=125.(5+75)`

`=125.80`

`=10000`

$25^{2}$ + 5 . 75 + $75^{2}$

= $25^{2}$ +5.3.25 + $(25.3)^{2}$

=$25^{2}$ + 5.3.25 +$3^{2}$. $25^{2}$

=25(25+3.5+$3^{2}$ +25)

=25.74

=1850

$#tvan$