exam Maths Puzzle Numerical Ability

Simplify: (1 + i)/(2 - i).

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exam Other Question

Determine whether each of the following trinomials is a perfect square. If it is, factor the trinomial.

16x^2+40xy+25y^2 Can anyone help me to the inequality represented by the graph??

<-- -20-- -10--0---10---*20---30---40-->

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