Roots r,s of Quadratic
Source:
February 1, 2009
quadratics
Problem Statement
If and are the roots of the equation ax^2 \plus{} bx \plus{} c \equal{} 0, the value of \frac {1}{r^2} \plus{} \frac {1}{s^2} is:
(A)\ b^2 \minus{} 4ac \qquad(B)\ \frac {b^2 \minus{} 4ac}{2a} \qquad(C)\ \frac {b^2 \minus{} 4ac}{c^2} \qquad(D)\ \frac {b^2 \minus{} 2ac}{c^2}