Question

The square of a number decreased by ten times the number is negative nine.

Answer 1

x^2 - 10x =-9

x=1 or x=9

Answer 2

9 OR 1

Explanation:

Let the number be x

x² - 10x = -9

x² - 10x + 9=0

a=1

b=-10

c=9

Solve using the quadratic formula

x =9 or 1