exam Maths Puzzle Numerical Ability

PLease help to simplify

-3i^4 + 5i^3

DIVIDED BY

6i^2 - 7i

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exam Other Question

The length of a rectangle is 1cm longer than its width. If the diaganol of rectangle is 4cm, what are the dimensions (length and width) of the rectangle?

Thank you How many numbers are there whose absolut e value is -3.7?