Q. 1 C5.0( 1 Vote )

# Determine whether

Let f(x) = 3x3 + 8x2 + 6x – 5

By factor theorem,

x + 1 = 0 ;x = – 1

If f(– 1) = 0 then (x + 1) is a factor of f(x)

f(– 1) = 3(– 1)3 + 8(– 1)2 – 6(– 1) – 5

= – 3 + 8 + 6 – 5 = 6(not equal to 0)

(x + 1) is not a factor of f(x) = 3x3 + 8x2 + 6x – 5

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