exam Maths Puzzle Numerical Ability

y=(4-x)-1
this is is a square root

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exam Other Question

Hello! I am having problems with with the problem and need some help.

solve: Square root x-1 =x-3


Thank you for the help
Can you please help me in simplifying this complex fraction?

x-3/x+3 + x+3/x-3
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x-3/x+3 - x+3/x-3