exam Maths Puzzle Numerical Ability

question is reduce the rationals expression to the lowest terms

3x^2 - 9x+6 over 10-5x

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exam Other Question

Solve for the indicated letter

b=a+z, for a
9:
(x3 + 4x2 - 2x + 5) - (3x3 - 3x2 + x - 2)