ACT 2021 April(D05) Math Question 33 Explanation - ACT Helper

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2021 April(D05) Math Question 33
Quadratic Equations
- Factoring
Factoring cubic polynomials
Choice D
$P (x) = x^{2} (x - 10) + 9 (x - 10)$
$= (x - 10) (x^{2} + 9) = 0$
$∴ x = 10$
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