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6 March, 00:04

If a^3+216 = (a+6) (a^2+ka+36), what does k equal?

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  1. 6 March, 01:33
    0
    k = - 6

    Step-by-step explanation:

    1. Switch sides

    2. Divide both sides by a + 6

    3. Subtract a2 both sides

    4. Simplify

    5. Subtract 36 from both sides

    6. Simplify

    7. Divide both sides by a

    8. Simplify
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