Let's solve each of the polynomial division problems step by step. The goal is to divide each polynomial by the given monomial or polynomial, simplifying as much as possible.
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1) $ (6x^3 + 3x^2 + 9x^4) \div 3x $
Step 1: Rewrite in standard form (descending powers):
$$
(9x^4 + 6x^3 + 3x^2) \div 3x
$$
Step 2: Divide each term by $3x$:
$$
\frac{9x^4}{3x} + \frac{6x^3}{3x} + \frac{3x^2}{3x}
= 3x^3 + 2x^2 + x
$$
✔ Answer: $ 3x^3 + 2x^2 + x $
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2) $ (2k^5 - 8k^2 - 6k^3) \div 2k^2 $
Step 1: Rewrite in standard form:
$$
(2k^5 - 6k^3 - 8k^2) \div 2k^2
$$
Step 2: Divide each term by $2k^2$:
$$
\frac{2k^5}{2k^2} - \frac{6k^3}{2k^2} - \frac{8k^2}{2k^2}
= k^3 - 3k - 4
$$
✔ Answer: $ k^3 - 3k - 4 $
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3) $ (5m^4 + 10m^6 - 15) \div 5 $
Step 1: Rewrite in standard form:
$$
(10m^6 + 5m^4 - 15) \div 5
$$
Step 2: Divide each term by 5:
$$
\frac{10m^6}{5} + \frac{5m^4}{5} - \frac{15}{5}
= 2m^6 + m^4 - 3
$$
✔ Answer: $ 2m^6 + m^4 - 3 $
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4) $ (-8n^8 - n^7) \div (-n^4) $
Step 1: Divide each term by $-n^4$:
$$
\frac{-8n^8}{-n^4} + \frac{-n^7}{-n^4}
= 8n^{8-4} + n^{7-4}
= 8n^4 + n^3
$$
✔ Answer: $ 8n^4 + n^3 $
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5) $ (-4w^7 + 6w^6 + w^3 - 6w^5) \div w^3 $
Step 1: Rewrite in standard form:
$$
(-4w^7 - 6w^5 + 6w^6 + w^3) \div w^3
= (-4w^7 + 6w^6 - 6w^5 + w^3) \div w^3
$$
Step 2: Divide each term by $w^3$:
$$
\frac{-4w^7}{w^3} + \frac{6w^6}{w^3} - \frac{6w^5}{w^3} + \frac{w^3}{w^3}
= -4w^4 + 6w^3 - 6w^2 + 1
$$
✔ Answer: $ -4w^4 + 6w^3 - 6w^2 + 1 $
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6) $ (-7x^5 + 7x^3) \div 7x^4 $
Step 1: Divide each term by $7x^4$:
$$
\frac{-7x^5}{7x^4} + \frac{7x^3}{7x^4}
= -x^{5-4} + x^{3-4}
= -x + x^{-1}
$$
But $x^{-1}$ is $ \frac{1}{x} $, so:
$$
-x + \frac{1}{x}
$$
⚠️ This expression has a negative exponent — it’s not a polynomial. But since the question asks to divide, we can write it as:
✔ Answer: $ -x + \frac{1}{x} $
Alternatively, leave as: $ -x + x^{-1} $
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7) $ (8y^3 + 16y) \div (-8y) $
Step 1: Divide each term by $-8y$:
$$
\frac{8y^3}{-8y} + \frac{16y}{-8y}
= -y^{3-1} - 2
= -y^2 - 2
$$
✔ Answer: $ -y^2 - 2 $
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8) $ (6v^6 - 5v^4 + v^7) \div v $
Step 1: Rewrite in standard form:
$$
(v^7 + 6v^6 - 5v^4) \div v
$$
Step 2: Divide each term by $v$:
$$
\frac{v^7}{v} + \frac{6v^6}{v} - \frac{5v^4}{v}
= v^6 + 6v^5 - 5v^3
$$
✔ Answer: $ v^6 + 6v^5 - 5v^3 $
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✔ Final Answers Summary:
1) $ 3x^3 + 2x^2 + x $
2) $ k^3 - 3k - 4 $
3) $ 2m^6 + m^4 - 3 $
4) $ 8n^4 + n^3 $
5) $ -4w^4 + 6w^3 - 6w^2 + 1 $
6) $ -x + \frac{1}{x} $
7) $ -y^2 - 2 $
8) $ v^6 + 6v^5 - 5v^3 $
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Let me know if you'd like these explained with long division or factoring!
Parent Tip: Review the logic above to help your child master the concept of division of polynomials worksheet with answers.