Wednesday

September 28, 2016
Posted by **Mary** on Sunday, October 10, 2010 at 7:09pm.

y<x squared - 3x + 15

whats my x and whats my y ? should i factor ?

- Algebra 2 -
**Henry**, Tuesday, October 12, 2010 at 6:50pmTo graph the inequality, graph :

Y= x^2 - 3x + 15 = 0,

Step 1. Find the coordinates (h,k) of

the vertex:

h = Xv = -b/2a = 3/2 = 1.5,

Substitute 1.5 for x in the guad. Eq:

k = Yv = (1.5^2) - 3*1.5 + 15 = 12.75,

V(1.5 , 12.75),

Step 2. Select values of x above and

below h(Xv) and cal. the corresponding value of y:

(-1 , 19), (0 , 15), (1 , 13), (1.5 , 12.75), (2 , 13), (3 , 15).

The parabola does not cross the x-axis.

Therefore, there are no real solutions.

But we have 2 imaginary solutions(roots) which can be cal. using the

quadratic formula.