SOLUTION: 5x^2-100=0

Question 704345: 5x^2-100=0
Answer by Simnepi(216) (Show Source): You can put this solution on YOUR website!
First let's get the unknowns on one side of the equals and the numbers on the other side.
To do this we must add 100 to each side, giving

Simplifying this gives
(the -100 and +100 cancel each other!)
Now we can divide both sides of the equation by 5 (to get rid of the 5 in front of the , giving

Simplifying this gives

Now because 20=4X5 we can write

to find x we have to take the square root of both sides of the equals sign

giving

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