Quadratic EquationHard
Question
If a,b are roots of the equation x2 + qx + 1 = 0 and c,d are roots of x2 + px + 1 = 0, then the value of (a − c) (b − c) (a + d) (b + d) will be
Options
A.q2 − p2
B.p2 − q2
C.− p2 − q2
D.p2 + q2
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