exam Maths Puzzle Numerical Ability

What is the radical of x+4-2 radical x-1 = -1?

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exam Other Question

Pure Profit earns $10 profit per ticket, but owes an initial $175. Ernie Earn-a-lot owest an initial $150, but makes a different amount of profit depending on the number of ticket i dont want to know the answer i just want to know what i need to do to get the answer

Simplify:

1+2i
----
2-3i