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It is y^2 or y squared
A negative exponent means the reciprocal of the positive exponent → y^-8 = 1/(y^8) = 1/(y×y×y×y×y×y×y×y)
(y^2 - 4) / (y + 2) = [(y -2)(y+2)]/(y+2) = y-2
2x / (y-2) + 2x / (2-y)First get a common denominator: (y-2) (2-y)Then you have:2x(2-y) / (y-2)(2-y) + 2x(y-2) / (y-2)(2-y), summing and simplifying, you get:(4x-4) / (y-2)(2-y)
sqrt(y*y) = sqrt(y2) =± y