Q. Divide by using long division.(10x2+9x−1)÷(2x−1)
Set up division: Set up the long division.We will divide the polynomial 10x2+9x−1 by the binomial 2x−1 using long division.
Find quotient: Determine how many times the leading term of the divisor 2x goes into the leading term of the dividend 10x2. rac{10x^2}{2x} is rac{5x}{1}. Write rac{5x}{1} above the long division bar.
Multiply quotient and divisor: Multiply the entire divisor (2x−1) by the quotient found in Step 2(5x).5x×(2x−1)=10x2−5x. Write this result under the dividend.
Subtract result: Subtract the result of Step 3 from the dividend.(10x2+9x−1)−(10x2−5x)=14x−1. Bring down the next term if necessary.
Determine new quotient: Determine how many times the leading term of the divisor 2x goes into the new term 14x. rac{14x}{2x} = 7. Write 7 above the long division bar, next to 5x.
Multiply new quotient: Multiply the entire divisor (2x−1) by the new quotient found in Step 5(7).7×(2x−1)=14x−7. Write this result under the 14x−1.
Subtract result: Subtract the result of Step 6 from the new term (14x−1).(14x−1)−(14x−7)=6. This is the remainder.
Write final answer: Write the final answer.The quotient is 5x+7 with a remainder of 6. The final answer is written as 5x+7+2x−16.
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