book Maths Puzzle Numerical Ability

evaluate
i^22
and
i^31

simplify with imaginary numbers
square root -256
(31i-2)5i
(squareroot6+i)(squareroot6-i)
thanks

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book Other Question

4x+3y<6
x-2y>4
How do I shade the sloution set in an xy plane??? ANd use a test point?

x + y { greater than or equal to sign used} 4
y < 5/2x - 3