exam Maths Puzzle Numerical Ability

I need to be informed and taught how to solve these types of problems. its on page 349.thanks

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exam Other Question

2) If f(t)=2t squared minus 4t minus 1,find

a) f(2)

Answer:
Show your work here:


b) f(-1)
Answer:
Show your work here:
If the sum of the measures of two exterior angles of a triangle is 230, find the measures of the third exterior angle and its adjacent interior angle.