exam Maths Puzzle Numerical Ability

(2+i)x-i=5+i

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exam Other Question

Simplify the following expression. (-xt^2)(-2x^2t)^4 20. Ken has worked at the same company for many years. The function A(t) gives his annual salary A at any time t, is the number of years after 1980.
a. Ken's friend Gabriel works