exam Maths Puzzle Numerical Ability

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

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exam Other Question

Find the domain of the given function.
h(x)= 1/x+1



____ (Use interval notation.)
How do you factor this trinomial----------------------------------------------
{{{{x^2+30x+216=0}}}
Thanks so much!