exam Maths Puzzle Numerical Ability

simplify:

[(3x^3)/(x^3+27)] - [ (x)/(x+3) ] + [(2x^2)/(x^2-3x+9) ]

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exam Other Question

Write each complex number in rectangular form. If necessary, round to the nearest tenth:
7(cos 3pi/2 + i sin 3pi/2)
Thanks for your help :) Please help me Form A quadratic equation and help me Discuss the slope or rate of change