SOLUTION: Four times the square of a number is 16. find the number. thank you

Algebra ->  Algebra  -> Polynomials-and-rational-expressions -> SOLUTION: Four times the square of a number is 16. find the number. thank you      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 39924: Four times the square of a number is 16. find the number.

thank you
Answer by fractalier(2101) About Me  (Show Source):
You can put this solution on YOUR website!
Let the number be x.
Its square is then x^2.
So we have
4x^2 = 16
x^2 = 4
x = ±2