Q. 34.1( 17 Votes )

# If x = 2 i

Answer :

We have,

f (x) = 2x2 – 3x + 7a

Put x = 2

f (2) = 2 (2)2 – 3 (2) + 7a

= 2 * 4 – 6 + 7a

= 8 – 6 + 7a

= 2 + 7a

Given, x = 2 is a root of f (x) = 2x2 – 3x + 7a

f (2) = 0

Therefore, 2 + 7a = 0

7a = -2

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