Q. 223.5( 2 Votes )

The roots of the equation 2x2 - 6x + 7 = 0 are
A. real, unequal and rational

B. real, unequal and irrational

C. real and equal

D. imaginary

Answer :

For the given equation 2x2 - 6x + 7 = 0


a = 2 b = - 6 c = 7


D = b2 - 4ac


= ( - 6)2 - 4.2.7


= 36 – 56 = - 20 < 0


Thus the roots of equation are imaginary.

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