exam Maths Puzzle Numerical Ability

Solve for x:
a)(2x-1)^1/2=sqrt3
b)8^(2x)+8^x=0
c)(x+3)^(2/3)=4

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exam Other Question

How do I know if a value is a solution for an inequality and how is this different from determining if a value is a solution to an equation? can i get some help on solving this. i need your great knowledge

Find all real and imaginary solutions to each equation.

104. x^-2 - 9x^-1 + 18 = 0