Question

What is the possible discriminant of the graph with the points (-7,0) and (-3,0)?

a.0
b.16
c.15
d.–13

Answer 1

Wait, that's wrong. It has to be the perfect square since the x-ints (the roots of the equation) are rational. Answer is B.

Answer 2

Answer B under the assumption that the coefficients are rational.

Answer 3

\[y=(x+7)(x+3)=x^2+10x+21\]
\[discrimnant=b^2-4ac=(10)^2-4(1)(21)=100-84=16\]