exam Maths Puzzle Numerical Ability

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Multiply
3 sqrt a(3sqrt3a^2+3sqrt^81a^2)

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exam Other Question

Resolve7-8x/(1-x)*(2-x)into partial fractions.Hence find the expansionof the function in ascending powers of as far as three nonzero terms. State for which values of x this expansi simplify the square root of 20 power 5 minus 1 power the square root of 5