kylepolevault
1 Answer
jenp
In order to solve the function 9x2 + 31x + 12 ≤ 0 you need to use the quadratic formula:![x = [ -b ± sqrt(b^2 - 4ac) ] / 2a](http://www.purplemath.com/modules/quads/qform01.gif)
.
a, b, and c are determined according to ax2 + bx + c : a = 9, b = 31, and c = 12.
Because ax2 has apositive sign before it, the function look like this:
, and not like this:
, and according to the x values found with the quadratic equations, you can draw a graph of the funcion, and from the graph you can determine what x values give y values that are bigger than 0, smaller than 0, or equal to 0.
| 13 years ago. Rating: 0 | |
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