0
Let the numbers by 'm' & 'n'
Hence
mn = -72
m + n = -1
It follows
m = -1-n
Substitute
(-1-n)N = -72
Multiply out the brackets
-n - n^(2) = -72
Hence
n^2 + n -72 = 0
It is now in quadratic form to solve for 'n'
Factor
(n + 9)(n - 8) = 0
Hence n = -9 & n = m = 8
So the two numbers are '-9' & '8' .
lenpollock
Wiki User
∙ 12y agomultiplying
-9x8=-72
add to get -1
-2+1=-1
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