exam Maths Puzzle Numerical Ability

Algebraically determine the zero(s) of the functions:
a) f(x)=(sqrt2(5)^-(x+1))-(sqrt50)
b) f(x)=sqrt3(2)(^2(x-3))-sqrt48

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exam Other Question

I am trying to solve and graph 3(X+1)^2+3(y-1)^2=6
I came up with 1,-1) radius 1.4142 but I think it might be backwards. what is the domain and range for the equation: y=-4