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

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

thank you
Answer by fractalier(6550) 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