if 5 is added to the square of a number, the result is 30. find all such numbers.

Question

None 

Answer 1

Hi Shay,

 

let's assume the number to be equal to x. Then, the wording in the problem can be written as

x² + 5 = 30

x² = 25

 

There are two solutions to this as the square of negative numbers are also positive.

x={-5, 5}