Divide 315,530,612 by 3,539,225 to get 89 people per square mile (rounded)
Answer:
in given triangle
applying Pythagoras theorem
(29)^2= (12)^2 + (x)^2
= 841= 144 + x^2
841-144 = x^2
697= x^2
x = square root of 697
x= 26.4
x^2 - 4
------------------------------
x + 7 | x^3 + 7x^2 - 4x - 28
x^3 + 7x^2
------------------
0 - 4x - 28
-4x - 28
-------------
0
Now we know that
x^3 + 7x^2 - 4x - 28 = (x^2 - 4)(x + 7)
x^2 - 4 can be factored since it is the difference of two squares.
x^2 - 4 = (x + 2)(x - 2)
The complete factoring is:
x^3 + 7x^2 - 4x - 28 = (x +2)(x - 2)(x + 7)
ANSWER
My answer is in the photo above