Homework Help: Algebra

Posted by Nelson on Monday, December 7, 2009 at 3:07pm.

Need a formula; the product of two consecutive integers is 41 more than their sum. Find the integers.

Algebra - Reiny, Monday, December 7, 2009 at 3:15pm
let the two numbers be x and x+1

then x(x+1) = x + y + 41
expanding and simplifying we get
x^2 - x - 42 = 0
(x-7)(x+6) = 0
x = 7 or x = -6

case 1: the two numbers are 7 and 8
check: product = 56
sum = 15, 56 is greater than 15 by 41

case 2: the two numbers are -6 and -5
check: product is 30
sum is -11
30 is 41 greater than -11

so the two numbers are either 7 and 8 or
-6 and -5

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