Step-by-step explanation:
In order to find the length of side TS, first we need to find the length of side TR which is perpendicular to side QS.
By Geometric mean property:

90 degrees exactly. It is four 90 degree angles
Step-by-step explanation:
(x+3)(x-5)
= x²-5x+3x-15 = x²-2x-15
But the given polynomial x³-15
So it is not the correct factorization.
Again, (x-3)(x+5)
= x²+2x-15
But the given polynomial x³-15
So it is not the correct factorization.
Again , (x+3)(x²-4x+5)
= x³-4x²+5x+3x²-12x+15
= x³-x²-7x+15
But the given polynomial x³-15
So it is not the correct factorization.
So , optionD is the correct answer
The answer to this question is in the picture which is 0.56% to 2dp