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whats the question your asking

identify the x-intercepts in the graph y = 3x2 + 19x – 40..sorry connection was slow

The Def'n of the x-intercept is the points where the y-value is zero. So set y to 0 and solve for x

use the quadratic formula

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

Quadratic formula for 0 = ax^2 + bx + c\[x= {-b \pm \sqrt{b^2-4ac} \over 2a}\]

thank you guys.. but how do I do that?

are you studying algebra 1 or 2?

|dw:1357172313426:dw|just sub into formula and use order of operation to evaluate it

This can also be factored if you are well versed at factoring

you could also, find the roots by looking at the graph of the function

thankyou precal. (:

\[0=3x^2 + 19x – 40\]\[0=(3x-5)(x+8)\]

im horrible in math, so after alg 2 i will be done with it :P

what will you do in the future? future goals?

|dw:1357172585393:dw|

|dw:1357172654731:dw|

|dw:1357172718818:dw|

well math teaches us to be patient and to pay attention to details

im givin different answers on this question. im confused which one is wrong or right?

yw