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Solve: find all values of x where f(x) = x³ − 6x² + 9x − 4 equals zero

Step 1 — try rational roots

Possible rational roots are ±1, ±2, ±4. Testing x = 1:

f(1) = 1 − 6 + 9 − 4 = 0 ✓

Step 2 — factor out (x − 1)

x³ − 6x² + 9x − 4 = (x−1)(x²−5x+4)

Step 3 — solve the quadratic

(x−1)(x−1)(x−4) = 0

Solutions: x = 1 (double root) and x = 4

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Question 3 / 10

Which of the following best describes the concept of comparative advantage?

Correct! Comparative advantage focuses on opportunity cost, not absolute productivity.
3 correct · 0 wrong100%
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