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Divide: (x4+8x310x248x17)÷(x26)(x^{4}+8x^{3}-10x^{2}-48x-17)\div(x^{2}-6)

Full solution

Q. Divide: (x4+8x310x248x17)÷(x26)(x^{4}+8x^{3}-10x^{2}-48x-17)\div(x^{2}-6)
  1. Use Polynomial Long Division: To divide the polynomial x4+8x310x248x17x^4 + 8x^3 - 10x^2 - 48x - 17 by the binomial x26x^2 - 6, we will use polynomial long division.
  2. Divide Leading Terms: First, we divide the leading term of the dividend, x4x^4, by the leading term of the divisor, x2x^2, to get x2x^2. This will be the first term of our quotient.
  3. Subtract Result: Next, we multiply the entire divisor x26x^2 - 6 by x2x^2 and subtract the result from the dividend.\newlinex2(x26)=x46x2x^2 \cdot (x^2 - 6) = x^4 - 6x^2.\newlineSubtracting this from the dividend gives us:\newline(x4+8x310x2)(x46x2)=8x3+4x248x17(x^4 + 8x^3 - 10x^2) - (x^4 - 6x^2) = 8x^3 + 4x^2 - 48x - 17.
  4. Divide New Leading Term: Now, we divide the leading term of the new dividend, 8x38x^3, by the leading term of the divisor, x2x^2, to get 8x8x. This will be the next term of our quotient.
  5. Subtract Result Again: We multiply the entire divisor x26x^2 - 6 by 8x8x and subtract the result from the new dividend.\newline8x(x26)=8x348x8x \cdot (x^2 - 6) = 8x^3 - 48x.\newlineSubtracting this from the new dividend gives us:\newline(8x3+4x248x)(8x348x)=4x217(8x^3 + 4x^2 - 48x) - (8x^3 - 48x) = 4x^2 - 17.
  6. Divide Remaining Term: Finally, we divide the leading term of the remaining dividend, 4x24x^2, by the leading term of the divisor, x2x^2, to get 44. This will be the last term of our quotient.
  7. Subtract Final Result: We multiply the entire divisor x26x^2 - 6 by 44 and subtract the result from the remaining dividend.\newline4(x26)=4x2244 \cdot (x^2 - 6) = 4x^2 - 24.\newlineSubtracting this from the remaining dividend gives us:\newline(4x217)(4x224)=7(4x^2 - 17) - (4x^2 - 24) = 7.
  8. Determine Quotient and Remainder: The remainder is 77, which cannot be divided further by x26x^2 - 6 since it is of lower degree. Therefore, the quotient is x2+8x+4x^2 + 8x + 4 with a remainder of 77.

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