exam Maths Puzzle Numerical Ability

This test is very difficult and any help would be so very much appriciated, please reply asap. The problem is:

Please Simplify
3-5i
2+7i

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exam Other Question

Graph the numbers on a number line. Then write two inequalities that compare the two numbers.

# 26. -1 5/6 and -1 7/9 Are (x - 1) and (x + 4) factors of P(x) = 2x3 + 5x2 - 13x + 4 ?