Use polynomial long division: To divide the polynomial (x3+x2+3) by (x+4), we will use polynomial long division.
Divide leading terms: First, we divide the leading term of the numerator, x3, by the leading term of the denominator, x, to get x2.
Multiply by result: We then multiply the entire denominator (x+4) by this result (x2) to get x3+4x2.
Subtract to find remainder: Next, we subtract the product (x3+4x2) from the original numerator (x3+x2+3) to find the new remainder. This gives us (x3+x2+3)−(x3+4x2)=−3x2+3.
Divide new remainder: Now, we divide the leading term of the new remainder, −3x2, by the leading term of the denominator, x, to get −3x.
Multiply by −3x: We multiply the entire denominator (x+4) by −3x to get −3x2−12x.
Subtract to find next remainder: Subtract this product from the current remainder to find the next remainder. This gives us (−3x2+3)−(−3x2−12x)=12x+3.
Divide new remainder: Now, we divide the leading term of the new remainder, 12x, by the leading term of the denominator, x, to get 12.
Multiply by 12: We multiply the entire denominator x+4 by 12 to get 12x+48.
Subtract to find next remainder: Subtract this product from the current remainder to find the next remainder. This gives us (12x+3)−(12x+48)=−45.
Check for completion: Since the degree of the remainder −45 is less than the degree of the denominator x+4, we cannot continue the division process. The result of the division is the quotient plus the remainder over the original divisor.
Final answer: The quotient we obtained is x2−3x+12, and the remainder is −45. Therefore, the final answer is x2−3x+12 with a remainder of −45, which can be written as (x2−3x+12)−x+445.
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