Question

The square of a number added to 3 times the number is 28

Answer 1

3x28=84

Step-by-step explanation:

Answer 2

Answer: the number is 5

Step-by-step explanation:

Let the number be $x$ , then the square of the number means $x^{2}$ .

Therefore:

$x^{2} +3=28$

subtract 3 from both sides

$x^{2} = 28 - 3$

$x^{2} =25$

find the square root of both sides

$x = 5$