exam Maths Puzzle Numerical Ability

Factor.

a^2 + 16a + 64

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exam Other Question

how do you write this as a single logarithm?
4/3In(x^2-1)+2In(x+2)-1/3In(x-4)
thank you
Which of the following sets of vectors are linearly independent?

A) [0 0], [-3 2]

B) [6,-7]

C) [3,2,0], [4,-7,-8], [9,-6,5]

D) [-8,2,0], [9,6,0], [-7,-5,0]

E) [-9