Verified answer

The x-intercepts are the points such that y=0. Therefore,

3x^2 + 19x - 40=0

x = (-19 +- sqrt(19^2+12·40))/6,

x1 = -8, x2 = 5/3

And the points are ( -8, 0), (5/3, 0)

once you've a graphing calculator, purely positioned this equation into the "Y=". as quickly because this is graphed, press "second," then "calc" (4 button on the very accurate). then, press "2" or "0." this may carry you to the graph. pick your left and authentic barriers for each intercept then you definately calculator will calculate the x-ingtercepts. desire this wasnt too confusing.