exam Maths Puzzle Numerical Ability

i dont understand how to do this stuff i am so confused on what to do and what are the (1,3) and stuff for?

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exam Other Question

Please help!

Evaluate

a - absolute vale of b*a^2 - ba
A plane and a line ________ intesect in a single point.

(a) always (b) sometimes (c) never (d) not enough information