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Pre calc exam help don’t understand due today

Pre calc exam help don’t understand due today-example-1
User Sahil M
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Answer:

x³ + 4x² - 9x - 36 = 0

x²(x + 4) - 9(x + 4) = 0

(x² - 9)(x + 4) = 0

(x + 4)(x + 3)(x - 3) = 0

x = -4, -3, 3

User VRAwesome
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