Complex numbers and complex planes

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  1. For the following quadratic equations,
    i) find and classify the roots
    ii) plot the roots on the complex plane
    1. y=x21 y=x^2-1
    2. y=x2+1 y=x^2+1
    3. y=x2+2x5 y=-x^2+2x-5
  2. Given that function f(x)=2x22x+3 f(x)=2x^2-2x+3 , find the roots of the function