exam Maths Puzzle Numerical Ability

Hey guys,

I really need help with them. I've been within my text, on the internet, and I can't find an example of how to do this problem.

Simplify the formula..

1

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exam Other Question
Solve by completeing square

x^2=4-7x

3x^2-x-x-2=0

If the square of 2 less than an interger is 16, find the number(s)? I would love to get help with the problem below. Thank you very very much!

18+sqrt567
___________
9