SOLUTION: Set up an equation and solve the problem 5 times the square of a number equals 45. Find the number. Thanks in advance..

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Set up an equation and solve the problem 5 times the square of a number equals 45. Find the number. Thanks in advance..      Log On


   

Question 343974: Set up an equation and solve the problem
5 times the square of a number equals 45.
Find the number.
Thanks in advance..
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
5 times the square of a number equals 45.
Find the number.
.
Let x = the number
then
5(x^2) = 45
x^2 = 9
x = sqrt(9)
x = +- 3
that's "plus or minus" three