Question 249055
f(x) = {{{(7x^2 - 2)}}}

{{{x = (-0 +- sqrt( 0^2-4*7*-2 ))/(2*7) }}}

{{{x = (-0 +- sqrt( 0^2-4*7*-2 ))/(2*7) }}}

{{{x = (+-sqrt(( 56 ))/(14)) }}}
 {{{x = (+-sqrt2(( 14 ))/(14) )}}} 
{{{x = (+-sqrt(( 14 ))/(7)) }}} 

x-intercepts:
({{{+sqrt(( 14 ))/(7) }}}, 0)
({{{-sqrt(( 14 ))/(7) }}}, 0)
 

Some points:
(1,5)
(-1, 5)
(4, 26)
(-4, 26)

{{{ graph( 300, 200, -6, 5, -10, 10, 7x^2 - 2) }}}