Using graphing technology, approximate where the graph of y = 3x2 − 11x − 5 crosses the x-axis.

(4.15, 0) and (−0.45, 0)

(4.08, 0) and (−0.41, 0)

(4.02, 0) and (−0.49, 0)

(4.18, 0) and (−0.38, 0)

Question

Using graphing technology, approximate where the graph of y = 3x2 − 11x − 5 crosses the x-axis.

 (4.15, 0) and (−0.45, 0)

 (4.08, 0) and (−0.41, 0)

 (4.02, 0) and (−0.49, 0)

 (4.18, 0) and (−0.38, 0)

anonymous · Answer

http://www.wolframalpha.com/input/?i=y+%3D+3x^2+%E2%88%92+11x+%E2%88%92+5

anonymous · Answer

not sure what this is

anonymous · Answer

a graph of your parabola
it says to use a graph

anonymous · Answer

if you just want to cut to the chase and solve it, replace $y$ by $0$ http://www.wolframalpha.com/input/?i=0%3D+3x^2+%E2%88%92+11x+%E2%88%92+5 click on "approximate form" to get the decimal instead of the radical