Divide (— 1 + .y4) by (— 1 + y).
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Step-by-step explanation:
y^4-1 / y-1
(y^2+1)(y^2-1) / y - 1
(y^2+1)(y+1)(y-1)/ (y-1)
hence your answer is
(y^2+1)(y+1)
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