Factor the following expression
completely: 3x3 - 15x2 + 4x – 20
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Should I solve it for x?
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3x³ + 15x² - 4x - 20
collect x between the first and third term and 5 between the second and fourth:
x(3x² - 4) + 5(3x² - 4) =
collect # (3x² - 4);
= (3x² - 4) (x + 5)
hope it helps
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