Question 736796
Fifteen more than the square of a number is eight times the number.


Let the number be n

The square of the number is n^2

Eight time the number is 8n


Therefore we have:

n^2 + 15 = 8n

n^2 + 15 - 8n = 8n - 8n

n^2 - 8n + 15 = 0

Factor:

(n - 3)(n - 5) = 0



Answer:

n = 3, 5





Lennox Obuong
Algebra Tutor
Nairobi, Kenya