Q. Find the quotient and remainder using polynomial long division.(2x3−12x2+7x−28)/(2x2+5)The quotient isThe remainder is
Perform Division: We will perform polynomial long division to find the quotient and remainder when dividing (2x3−12x2+7x−28) by (2x2+5). First, we divide the leading term of the dividend, 2x3, by the leading term of the divisor, 2x2, to find the first term of the quotient. 2x3÷2x2=x.
Find First Term: We multiply the entire divisor (2x2+5) by the term we just found, x, and subtract the result from the dividend.(2x2+5)×x=2x3+5x.Subtract this from the dividend:(2x3−12x2+7x−28)−(2x3+5x)=−12x2+7x−5x−28=−12x2+2x−28.
Subtract Result: We bring down the next term of the dividend, which is already included in the subtraction result, and repeat the division process.Now we divide the leading term of the new polynomial, −12x2, by the leading term of the divisor, 2x2.−12x2÷2x2=−6.
Repeat Division: We multiply the entire divisor (2x2+5) by the term we just found, −6, and subtract the result from the new polynomial.(\(2x^{2}+5) \times (−6) = −12x^{2} - 30\. Subtract this from the new polynomial:(\(-12x^{2} + 2x - 28) - (−12x^{2} - 30) = −12x^{2} + 12x^{2} + 2x - 28 + 30 = 2x + 2\.
Find Next Term: Since the degree of the remaining polynomial 2x+2 is less than the degree of the divisor 2x2+5, we cannot continue the division process. Therefore, 2x+2 is the remainder.
Finalize Division: The quotient of the division is the sum of the terms we found: x−6. The remainder is the last polynomial we obtained: 2x+2.
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