Question 201679
 Find the x- and y-intercepts. If no x-intercepts exist, state so. 
f(x) = 15x^2 - 20x - 9
A) ((20 (+or-) sqrt 940)/(2)) , (0, -9)
B) ((20 (+or-) sqrt 940)/(2)) , (0, 9)
C) No x-intercepts, (0, -9)
D) No x-intercepts, (0, 9)
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To find the y-intercept, set x=0. --> y = -9, so it's (0,-9)
The answer is B or D.
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For the x-intercepts:
*[invoke solve_quadratic_equation 15,-20,-9]

(20 +/-sqrt(940))/30
= (10 +/-sqrt(235))/15
None of the above.