answersLogoWhite

0

What multiplies to -120 and adds to 7?

Updated: 10/4/2022
User Avatar

Wiki User

10y ago

Best Answer

-113

User Avatar

Tyrese Nolan

Lvl 10
3y ago
This answer is:
User Avatar
More answers
User Avatar

lenpollock

Lvl 15
1y ago

Let the numbers be m & n

Hence

mn = -120

m +n = 7

It follows m = 7 - n

Substitute

(7 - n)n = -120

Multiply out the brackets

7n - n^2 = -120

Form a Quadratic Eq'n

n^2 - 7n - 120 = 0

Factor

(n - 15)(n + 8) = 0

Hence n = 15 & m = -8

This answer is:
User Avatar

User Avatar

Wiki User

10y ago

-8 and +15

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What multiplies to -120 and adds to 7?
Write your answer...
Submit
Still have questions?
magnify glass
imp