exam Maths Puzzle Numerical Ability

How do you factor this trinomial----------------------------------------------
{{{{x^2+30x+216=0}}}
Thanks so much!

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exam Other Question

1.All squares are rectangles.
2. If a quadrilateral is a ractangle, then it has congruent diagonals.

I do not understand how to come to a conclusion on the question.
it says t
Please if you can help if you have the time. I answered the following question:


What constitutes a small sample size in a test of two
populations? Answer: A population les