Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If ƒ(x) = x 4 + 9x 3 + 35x 2 – x + 4, then ƒ (– 5 + 2 
) is equal to –
Text Solution
Verified by ExpertsThe correct answer is:
A
Let, y = – 5 + 4i ⇒ y 2 + 10y + 41 = 0
∴ ƒx) = x 4 + 9x 3 + 35x 2 – x + 4
= x 2 (x 2 + 10x + 41) – x(x 2 + 10x + 41) + 4(x 2 + 10x + 41) – 160
= – 160
∴ ƒ (– 5 + 4i) = – 160
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