Question

If f(x) = x^3 - 2x. Find f(3)

Answer 1

Answer:

21

Step-by-step explanation:

Given : f(x) = x³ - 2x

Putting x = 3, we get

→ f(3) = (3)³ - 2(3)

→ f(3) = 27 - 6

→ f(3) = 21

Hence, the answer is 21.

_____________________________

The above given polynomial is a cubic polynomial.

Cubic polynomials are the polynomials of highest degree of three.

For example : x³ - 2x² + 8

An equation involving a cubic polynomial is called a cubic equation.

Answer 2

Answer:

so here

x=3

f(3)=3³-2(3)

=27-6

=21

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Step-by-step explanation:

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