exam Maths Puzzle Numerical Ability

what is the center and radius of (x-1)^2+(y+2)^2=25?

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exam Other Question

I have to solve equations with fractional coefficients.
x/5-x+2/3=1/5
I got x=46
Please help me, Thank You=) Are (x - 1) and (x + 4) factors of P(x) = 2x3 + 5x2 - 13x + 4

thank you in advance