exam Maths Puzzle Numerical Ability

Please help to simplify

3i - 2i^2 + 3

Divided by

square root of -16 - the square root of -2 * the square root of -2

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exam Other Question

Given measure of angle 1 is congruent to measure of angle 2. Given measure of angle 3 is congruent to measure of angle 4. Prove Ray YS is perpendicular to line XZ. Diagram is Li (y*y)-2x-20y+94=0