Question

When I square my number, I get the same answer as when I multiply my number by 10 and then add 144. My number is positive. What is it?

Answer 1

Answer:

your number is 18

Step-by-step explanation:

x^2 = (x × 10 ) + 144

x^2 = 10x + 144

x^2 - 10x - 144 = 0

using quadratic method

your answer should be

(x- 18) ( x+8 )