6-7 If roots of equation 2x2-8x+c=0 are equal.
Then the value of c will be:
NTSE-2015 (Stage-1) UPJ
(A) 2
(B) 4
(C) 6
(D) 8
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Answer:
D=0
b^-4ac=0
64-4×2c=0
64=8c
c=8
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