exam Maths Puzzle Numerical Ability

State the domain of the following:
m(x)=5/x^2+9

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exam Other Question

Simplify:

3 sq root 32 - 5 sq root 50 - 8 sq root 45 + 7 sq root 20 If x*+p is a factor of ax^+x*+kx+b, show that k=ap and b=p.