Question

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

Answer 1

Oh yeah, I forgot to mention that there are 2 intercepts as it is a Parabola for a Quadractic Equation.

Answer 2

http://www.wolframalpha.com/input/?i=y+%3D+3x2+ −+11x+−+5+
Here is your graph. We want to look at the x values when y=0 (there are two of them).

Answer 3

here is a nice picture with 'graphing technology'
http://www.wolframalpha.com/input/?i=y+%3D+3x2+%E2%88%92+11x+%E2%88%92+5+

Answer 4

Thank you both.

:)

Answer 5

yw. why you are not just supposed to use the quadratic formula and get exact answers is not clear