exam Maths Puzzle Numerical Ability

What is the domain for (2, 4) (3, 9) (-2, 4) (-3, 9)

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exam Other Question

find a common solution for each system of equations:

y=x-1

y=2x-5
write -2(sqrt3) - 2i in trigonometric form, then find (-2(sqrt)-2i)^4