Posted by Mandy on Tuesday, November 22, 2011 at 8:04am.
The difference between two numbers is 9 and the product of the numbers is 162. Find the two numbers. Explain your working
- Mathematics - drwls, Tuesday, November 22, 2011 at 8:12am
Let x be the larger number
x*(x-9) = 162
Rearrange and factor
x^2 - 9x -162 = 0
(x+9)(x - 18) = 0
Take it from there.
There will be two pairs of solutions.
- Mathematics - Dr Russ, Tuesday, November 22, 2011 at 8:22am
so B=-18 or 9
correspondingly from AxB=162
A=-9 or 18
check against A-B=9
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