Question

Qual o resultado da expressão numérica a seguir ?

5²- √8+56:2
A) 4
B) 7
C) 19
D)26

Answer 1

The answer is 19.

Explanation:

We first need to calculate the powers, roots, products and divisions in the order they appear from left to right. For this expression we have:

5² - sqrt(8 + 56:2)

25 - sqrt(8 + 56:2)

25 - sqrt(8 + 28)

25 - sqrt(36)

25 - 6

Now we can calculate the sums and subtractions in the order they appear, from left to right:

25 - 6

19

The answer is 19