Posted by Farrah on Monday, October 24, 2011 at 10:08pm.
if b^2 - 4ac < 0 ---> no real zeros
if b^2 - 4ac = 0 ---> one real zero
ifb^2 - 4ac > 0 ---> two real zeros
if will do the 2nd question.
a=4, b= 2k-3 , c = 1
b^2 - 4ac
= (2k-3)^2 - 4(4)(1)
= 4k^2 - 12k + 9 - 16
= 4k^2 - 12k - 7
= (k + 1)(4k - 7)
(k+1)(4k-7) > 0 for 2 real roots
k < -1 OR k > 7/4
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