Question

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Using complete sentences, explain how to find the zeros of the function f(x) = 2x3 – 9x + 3. (2 points)

Answer 1

Quad formula

Answer 2

the quadratic formula would work if this was a quadratic

Answer 3

but this is actually a cubic

Answer 4

Oops, thanks Jim

Answer 5

np

Answer 6

because it's a cubic, I recommend using a calculator to find the approximate roots

Answer 7

Or try syntheic division

Answer 8

*synthetic

Answer 9

Use the work "bracket". I really like the work "bracket".

f(x) = 2x^3 – 9x + 3

f(0) = +3
f(1) = -4

Aha! I have bracketed a zero between x = 0 and x = 1!