Add or subtract Assume all variables represent real numbers

Add or subtract. Assume all variables represent real numbers.

19) 5 3r3y7-3xy 3/27y4 19) 5 VxVy/-3xy V27y 19) 5 /x3y7-3xy 27y4

Solution

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5 (x^3y^7)^(1/3) - 3xy (27y^4)^(1/3)

5(x^3)^(1/3) (y^7)^(1/3) - 3xy (27)^(1/3) (y^4)^(1/3)

5 x y^2 (y)^(1/3) - 3xy (3) y. y^(1/3)

5xy^2. y^(1/3) - 9xy^2.y^(1/3)

-4xy^(7/3)

Solution