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If roots of equation 2x^2 - 8x + c = 0 are equal. then the value of c will be 

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If roots of equation 2x2 - 8x + c = 0 are equal. then the value of c will be 

(1) 2

(2) 4

(3) 6

(4) 8

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 (4) 8

∵ Roots of the equation in equal.

∴ b2 - 4ac = 0

⇒ (-8)2 - 4 x 2 x c = 0

⇒ 64 - 8c = 0

⇒ c = 8

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