Question 342668
a) No restrictions, ({{{-infinity}}},{{{infinity}}})

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b) All x except those that make the denominator equal zero.
Solve for two solutions: {{{x(2x+1)=0}}}}
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c) Same as b). 
Solve for two solutions:{{{x^2+3x+2=(x+1)(x+2)=0}}}
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d) Square root needs non-negative arguments.
Solve {{{9-x^2>=0}}} to find the domain.
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e) Same as b)
Solve for two solutions:{{{x^2-36=(x+6)(x-6)=0}}}