
Reginald P. answered 01/27/15
Tutor
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Certified in Math and Physics, PhD Candidate in Engineering.
By using long division.
quotient = x2 - x - 1
divisor = x2 + x + 1
remainder = 2x + 2
Multiply the quotient and divisor = x4 - x2 - 2x - 1. Add this to the remainder to get x4 - x2 + 1