exam Maths Puzzle Numerical Ability

Hi!
The question for this is: for the function f(x)= x^2 -2x+1

a)find f(0)

b) solve f(x)=0


Please and Thank You=)

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exam Other Question
solve for r
c=2x3.14xr The graph of x-3y=6 is parallel to the graph of which equation?
1) y=-3x+6
2) y=-1/3x+5
3) y=3x-8
4) y=1/3x+8