it is known that b^2 - 4ac is a real root of equation ax^2 + bx + c = 0 (a=/ 0),then ( ) is true.
(A) ab> = 1/8
(B) ab <= 1/8
(C) ab >= 1/4
(D) ab <= 1/4
please show your solution :))
(A) ab> = 1/8
(B) ab <= 1/8
(C) ab >= 1/4
(D) ab <= 1/4
please show your solution :))
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