Equation in one of the forms
Write each of the following equation in one of the forms: y=a(x-h)^2+k, x=a(y-h)^2+k, [((x-h)^2/a^2)+((y-k)^2/b^2)=1] or (x-h)^2 +
(y-k)^2=r^2
1) 2x^2+2y^2=4-y
2) 3(3-x)^2=9-y
3) (x/4)^2+ (y/4)^2=1
4) 9x^2=1-9y
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