SOLUTION: find the x-internet. round to the nearest tenth: {{{y=4x^2-7}}} {{{y=3x^2+2x-5}}}

Algebra ->  Coordinate-system -> SOLUTION: find the x-internet. round to the nearest tenth: {{{y=4x^2-7}}} {{{y=3x^2+2x-5}}}       Log On


   

Question 241415: find the x-internet. round to the nearest tenth:
y=4x%5E2-7
y=3x%5E2%2B2x-5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
y=4x%5E2-7 red line
set y=0 & solve for the x values.
4x^2=7
x^2=7/4
x=sqrt1.75
x=+-1.3 ans.
y=3x%5E2%2B2x-5 green line
set y=0 & solve for the x values.
3x^2+2x-5=0
(3x+5)(x-1)=0
3x+5=0
3x=-5
x=-5/3
x=-1.7 ans.
x-1=0
x=1 ans.
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+4x%5E2+-7%2C+3x%5E2+%2B2x+-5%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 4x^2 -7 and 3x^2 +2x -5).