If (a2 + b2) x2 + 2(ab + bd) x + c2 + d2 = 0 has no real roots then – McqOptions

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1.	If (a2 + b2) x2 + 2(ab + bd) x + c2 + d2 = 0 has no real roots then
A.	ad = bc
B.	ab = cd
C.	ac = bd
D.	ad ≠ bc
Answer» E.

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