Question

quanto é (2,5) elevado a 2 ?

Answer 1

e facil 2,5²
2,5*2,5=6,25

entao 2,5²=6,25

Answer 2

$2,5^{2}=\left(\dfrac{25}{10}\right)^{2}\\ \\ =\dfrac{25}{10} \times \dfrac{25}{10}\\ \\ =\dfrac{25 \times 25}{10 \times 10}\\ \\ =\dfrac{625}{100}\\ \\ =6,25\\ \\ \\ \boxed{2,5^{2}=6,25}$