0
Best Answer
More answers
Let the number be m & n
Hence
mn = -8
m + n = 1
It follows that m = -8/n
Substitute
-8/n + n = 1
Multiply through by 'n'
-8 + n^2 = n
n^2 - n - 8 = 0
This does NOT factor so Complete the Square
n^2 - n = 8
(n - 1/2)^2 - (1/2)^2 = 8
(n - 1/2)^2 - 1/4 = 8
(n - 1/2(^2 = 8 1/4 = 33/4
Square Root both sides
n - 1/2 = +/-sqrt(33) / 2
n = 1/2 +/- sqrt(33) / 2
or
n = (1 +/- sqrt(33))/ 2
This answer is:
Add your answer:
Earn +20 ptsQ: What multiplies to -8 and adds to 7?
Write your answer...
Submit
Still have questions?
Continue Learning about Other Math
Related questions
What multiplies into -120 and adds up to -7?
-127
What multiplies into -720 but adds into 7?
-713
What multiplies to 18 and adds to -11?
7
What adds to 7 and multiplies to 49?
There is no answer, it is not possible
What multiplies to negative 144 and adds to 7?
151
What multiplies to 6 and adds to 7?
6 and 1
What adds to 10 but multiplies to 16?
8 and 2
What adds up to 7 and multiplies to 6?
6*1
What multiplies to 3 and adds to 4?
7
What multiplies to get -168 and adds to get 17?
-151
What adds up to -7 and multiplies to 6?
-6 and -1.
What adds to 16 and multiplies to 63?
The numbers are 9 and 7
Copyright ©2024 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.