Question

Find the axis of the graph of the function.

f(x) = 4x2 + 8x + 7

Answer 1

@jim_thompson5910 can u help plz!?

Answer 2

y assume you mean x axis?

in that case use quadratic formula.

Answer 3

yeah i mean the x axis. does that mean just plug it into the x axis and that will b my answer? @timo86m

Answer 4

it means you use the quadratic formula.

Oh there is also an axis of symetry i think.

Answer 5

I think you mean x-intercepts

Answer 6

i meant to say plug it into the quadratic formula sorry!!!!

Answer 7

x intercepts yes :)

Answer 8

So that would mean you do this


\[\Large x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}\]


\[\Large x = \frac{-(8)\pm\sqrt{(8)^2-4(4)(7)}}{2(4)}\]


I'll let you finish up

Answer 9

thanks guys!!!