exam Maths Puzzle Numerical Ability

Which properties are these?

=(8a^2+a^2) + 8a +7a

=(8+1)a^2+(8+7)a

=9a^2+15a

6(5a-3b-2b)

I am having a hard time, because they all look the same to me, if you could g

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exam Other Question

directly from the work book:

Sketch the graph of the function. Label the vertex.

y = x(squared) + 2x + 1
4+3.8=