exam Maths Puzzle Numerical Ability

I have to solve this problem algebraicly to verify that these equations will produce Pythagorean Triples....

p(2n+p)squared + 2n(n+p)squared = 2n(n+p)+p squared

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exam Other Question

One number is 11 less than another. If 10 times the smaller number minus 3 times the larger number is 30, find the two numbers.No book. Sorry. Thankyou!!! give the coordinates of the points graphed below.

R ( , ); S( ,); T( ,); V( ,)

Am I suppose to use a graph or something???