SOLUTION: A.) solve 5x^2=15 what are the solutions? B.) find the x-intercepts of f(x)=5x^2-15?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: A.) solve 5x^2=15 what are the solutions? B.) find the x-intercepts of f(x)=5x^2-15?      Log On


   

Question 328378: A.) solve 5x^2=15 what are the solutions?
B.) find the x-intercepts of f(x)=5x^2-15?
Found 2 solutions by Fombitz, Alan3354:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
a)5x%5E2=15
x%5E2=3
x=0+%2B-+sqrt%283%29
b) The x-interepts are the x values when f(x)=0.
f%28x%29=5x%5E2-15=0
5x%5E2=15
Looks familiar?
From a), x=0+%2B-+sqrt%283%29
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Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A.) solve 5x^2=15
x^2 = 3
x = +/- sqrt(3)
Was that hard?
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B.) find the x-intercepts of f(x)=5x^2-15?
Same as above.