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Divide. \[ \left(3 x^{2}+5 x-10\right) \div(x+3) \] Your answer should give the quotient and the remainder. Quotient: \( \square \) Remainder: \( \square \)

Ask by Phillips Cook. in the United States
Mar 08,2025

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Tutor-Verified Answer

Answer

Quotient: \(3x - 4\) Remainder: \(2\)

Solution

**Step 1: Divide the leading terms** Divide the leading term of the numerator, \(3x^2\), by the leading term of the divisor, \(x\): \[ \frac{3x^2}{x} = 3x \] So, the first term of the quotient is \(3x\). --- **Step 2: Multiply and subtract** Multiply the entire divisor by \(3x\): \[ 3x \cdot (x+3) = 3x^2 + 9x \] Subtract this from the original polynomial: \[ (3x^2 + 5x - 10) - (3x^2 + 9x) = -4x - 10 \] --- **Step 3: Divide the new leading term** Now, divide the new leading term \(-4x\) by \(x\): \[ \frac{-4x}{x} = -4 \] Add \(-4\) to the quotient. --- **Step 4: Multiply and subtract again** Multiply the divisor by \(-4\): \[ -4 \cdot (x+3) = -4x - 12 \] Subtract this from the current remainder: \[ (-4x - 10) - (-4x - 12) = 2 \] The remainder is \(2\). --- **Final Answer:** Quotient: \(3x - 4\) Remainder: \(2\)

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To divide the polynomial \( 3x^{2} + 5x - 10 \) by \( x + 3 \), we can use polynomial long division. 1. Divide the first term: \( 3x^{2} \div x = 3x \). 2. Multiply \( 3x \) by \( x + 3 \): \( 3x \cdot (x + 3) = 3x^{2} + 9x \). 3. Subtract this from the original polynomial: \[ (3x^{2} + 5x - 10) - (3x^{2} + 9x) = (5x - 9x - 10) = -4x - 10. \] 4. Now take the new polynomial \(-4x - 10\) and divide its first term by the first term of the divisor: \(-4x \div x = -4\). 5. Multiply \(-4\) by \(x + 3\): \(-4 \cdot (x + 3) = -4x - 12\). 6. Subtract: \[ (-4x - 10) - (-4x - 12) = -10 + 12 = 2. \] Putting it all together, the quotient is \(3x - 4\) and the remainder is \(2\). Quotient: \(3x - 4\) Remainder: \(2\)

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