1.mws

> A1 := (2*y-y^2)^(1/2);

A1 := sqrt(2*y-y^2)

> A2 := -(2*y-y^2)^(1/2);

A2 := -sqrt(2*y-y^2)

> B1 := (1-y^2)^(1/2);

B1 := sqrt(1-y^2)

> B2 := -(1-y^2)^(1/2);

B2 := -sqrt(1-y^2)

> plot({A1, A2, B1, B2}, y=-1.00..2.00);

[Maple Plot]

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