SOLUTION: a.solve. 5x2=35 b.find the x-intercepts of f(x)=5x2-35

Algebra ->  Functions -> SOLUTION: a.solve. 5x2=35 b.find the x-intercepts of f(x)=5x2-35      Log On


   

Question 192357This question is from textbook
: a.solve.
5x2=35
b.find the x-intercepts of f(x)=5x2-35 This question is from textbook

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
a) 5x%5E2=35
:
x%5E2=7divided both sides by 5
:
x=+sqrt%287%29 or x= -sqrt%287%29
:
b)x intercepts are found by setting y=0
:
5x^2-35=0 which is 5x%5E2=35 which we just solved
:
so x intercepts are at (sqrt%287%29,0) and (-sqrt%287%29,0)
:
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C5x%5E2-35%29