Step 1 :Perform long division of \(8x^4 - 2x^3 - 5x^2 + 1\) by \(2x^2 + x + 1\).
Step 2 :The first term of the quotient is \(4x^2\), because \(8x^4\) divided by \(2x^2\) is \(4x^2\).
Step 3 :Subtract \(8x^4 + 4x^3 + 4x^2\) from \(8x^4 - 2x^3 - 5x^2\) to get \(-6x^3 - 9x^2 + 1\).
Step 4 :The next term of the quotient is \(-x\), because \(-6x^3\) divided by \(2x^2\) is \(-3x\) and \(-3x\) divided by \(3\) is \(-x\).
Step 5 :Subtract \(-6x^3 - 3x^2 - 3x\) from \(-6x^3 - 9x^2 + 1\) to get \(-6x^2 + 4x + 1\).
Step 6 :The next term of the quotient is \(-1\), because \(-6x^2\) divided by \(2x^2\) is \(-3\) and \(-3\) divided by \(3\) is \(-1\).
Step 7 :Subtract \(-6x^2 - 3x - 3\) from \(-6x^2 + 4x + 1\) to get \(7x + 4\).
Step 8 :The remainder is \(-3\), because \(7x + 4\) cannot be divided by \(2x^2 + x + 1\).
Step 9 :So, the result is \(\boxed{4x^2 - x - 1 - \frac{3}{2x^2 + x + 1}}\).