Answer:
Common factor from the two pairs
n2+2n-n-2 or
n(n+2)-1(n+2)
Rewrote in factored form
n(n+2)-1(n+2)or
(n-1)(n+2)
Solution
(n-1)(n+2)
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)
The scale for the second values is 56/8 = 7
C = 3 x 7 = 21
C= 21
They sold 2 ham sandwiches and 6 turkey sandwiches (2+4=6)
So the answer is 2 :)
Problema Solution
Samuel has a collection of toy cars. His favorites are the 27 red ones, which make up 60% of his collection. How many toy cars does Samuel have?
Answer provided by our tutors
let x = the number of toy cars that Samuel has
60% of x are 27
0.60*x = 27
by solving we find
x = 45 cars