Asked by Jack
A student opens a mathmatics book to two facing pages. The product of the page numbers is 2352. Find the page numbers.
Answers
Answered by
PsyDAG
X * (X+1) = 2352
X^2 + X - 2352 = 0
Factor 2352 => 2 * 2 * 2 * 2 * 7 * 7 * 3
Since the third term is negative and the middle term is factored into 1 * X, combine the factors into two products that differ by 1.
2 * 2 * 2 * 2 * 3 = 48
7 * 7 = 49
Thus (X + 49)(X - 48) = 0
X = -49 or
X = 48
Since the page number cannot be negative, X = 48 and X + 1 = 49.
I hope this helps you to understand the process. Thanks for asking.
X^2 + X - 2352 = 0
Factor 2352 => 2 * 2 * 2 * 2 * 7 * 7 * 3
Since the third term is negative and the middle term is factored into 1 * X, combine the factors into two products that differ by 1.
2 * 2 * 2 * 2 * 3 = 48
7 * 7 = 49
Thus (X + 49)(X - 48) = 0
X = -49 or
X = 48
Since the page number cannot be negative, X = 48 and X + 1 = 49.
I hope this helps you to understand the process. Thanks for asking.
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