SOLUTION: a) Solve for 5x^2=15 b) Find the x-intercepts of f(x)=5x^2-15 Thank you

Question 433290: a) Solve for 5x^2=15
b) Find the x-intercepts of f(x)=5x^2-15
Thank you
Answer by katealdridge(100) (Show Source): You can put this solution on YOUR website!
First, divide both sides by 5.
Then take the sqrt of both sides.
and Don't forget every time you take a square root in a quadratic equation you always get plus and minus the answer.
The x-intercepts:to find an x-intercept you always substitute 0 in for y in the function.
As you'll see, you get the same answer as you just got above.
The point is that solving an equation is the same as finding the function's x-intercepts.
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