Question

Using graphing technology, approximate the solutions of 0.55x2 − 0.33x − 5.6 = 0.

x ≈ −2.91 and x ≈ 3.51

x ≈ −3.14 and x ≈ 3.81

x ≈ −2.76 and x ≈ 3.62

x ≈ −2.61 and x ≈ 3.84

Answer 1

just graph 0.55x^2 − 0.33x − 5.6 and look at the x axis and where it intercepts the x axis

Answer 2

http://www.wolframalpha.com/input/?i=0.55*x%5E2+%E2%88%92+0.33*x+%E2%88%92+5.6

look at this graph

Answer 3

https://www.google.com/search?q=0.55x%5E2+%E2%88%92+0.33x+%E2%88%92+5.6&oq=0.55x%5E2+%E2%88%92+0.33x+%E2%88%92+5.6&aqs=chrome.0.57j62.1154j0&sourceid=chrome&ie=UTF-8#sclient=psy-ab&q=0.55+x%5E2-0.33+x-5.6&oq=0.55+x%5E2-0.33+x-5.6&gs_l=serp.3...12554.140100.3.140713.2.2.0.0.0.0.88.165.2.2.0...0.0.0..1c.1.17.serp.T5xrFhLGHW8&psj=1&bav=on.2,or.r_cp.r_qf.&bvm=bv.48705608,d.cGE&fp=cf71ef956e505c39&biw=1440&bih=799

this one lets you zoom in

Answer 4

looks like -3 and 3.4

A looks closest