Problem

Divide the polynomial \(3x^3 - 2x^2 + 5x - 8\) by \(x - 2\).

Answer

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Answer

So, \(3x^3 - 2x^2 + 5x - 8\) divided by \(x - 2\) is \(3x^2 + 4x + 13 + \frac{18}{x - 2}\).

Steps

Step 1 :Set up the long division: \(\frac{3x^3 - 2x^2 + 5x - 8}{x - 2}\)

Step 2 :Divide the first term in the numerator by the first term in the denominator, \(\frac{3x^3}{x} = 3x^2\). Write this above the division line.

Step 3 :Multiply \(3x^2\) by \((x - 2)\) to get \(3x^3 - 6x^2\). Write this beneath \(3x^3 - 2x^2\) and subtract to get \(4x^2\).

Step 4 :Bring down the next term from the numerator to get \(4x^2 + 5x\).

Step 5 :Divide \(4x^2\) by \(x\) to get \(4x\). Write this above the division line next to \(3x^2\).

Step 6 :Multiply \(4x\) by \((x - 2)\) to get \(4x^2 - 8x\). Write this beneath \(4x^2 + 5x\) and subtract to get \(13x\).

Step 7 :Bring down the next term from the numerator to get \(13x - 8\).

Step 8 :Divide \(13x\) by \(x\) to get \(13\). Write this above the division line next to \(3x^2 + 4x\).

Step 9 :Multiply \(13\) by \((x - 2)\) to get \(13x - 26\). Write this beneath \(13x - 8\) and subtract to get \(18\).

Step 10 :Since there are no more terms to bring down from the numerator, this is the remainder. Write this as \(\frac{18}{x - 2}\) next to the quotient.

Step 11 :So, \(3x^3 - 2x^2 + 5x - 8\) divided by \(x - 2\) is \(3x^2 + 4x + 13 + \frac{18}{x - 2}\).

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