Answer:
first page is 12, and the facing page is 13.
Explanation:
The pages are facing each other, so they are consecutive numbers:
Let x = the first page number
y = the second page number
The second page number is just 1 more than the first, because they are consecutive numbers:
x+1 = y
We also know that the products of the numbers is equal to 156:
xy = 5852
Now we will sub y = x+1 into the second equation:
x(x+1) = 5852
x^2 + x = 5852
x^2 + x - 5852 = 0
Factoring (or using the quadratic formula) gives us:
(x+13)(x-12) = 0
x = - 13, or x = 12.
A page number can't be negative, so we will choose x=12.
This means that the second page must be page 13.