Question 759118
The square of a number is 10 more than 3 times the number.Find the number.Please Explain.

let x = the number then we have

x^2 = 3x + 10 and

x^2 -3x -10 = 0

factor the above equation

(x-5) * (x+2) = 0, then

(x-5)=0 and (x+2)=0

x can be 5 or -2