exam Maths Puzzle Numerical Ability

PLEASE HELP ME!!!!
Find the domain of the radical function:
f(x)= sqrt3/x+5

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exam Other Question

Find the x-intercepts and y intercepts for f(x)
f(x)=x^2-8x+11

I dont know is this is correct, i got the x intercepts are (4(+-) sqrt5/2,0) can someone please help me with this question

x-8/x+5 / x-9/x+4 written using PEMDAS

urgent