exam Maths Puzzle Numerical Ability

I could use some help on this problem.

Factor the following trinomials.

16x^2 + 40xy + 25y^2

I am not sure I am understanding this section and would appreciate any help. Thank you.

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exam Other Question

(log subscript a b)(log subscript b c)(log subscript c a)

use the change-of-base formula to find the value Every basketball season Phill competes in a free throw contest. This year Phill was successful at .75 of his free throws. If he succeeded at 12 of his free throws did he attempt?

Thank you!