What are two numbers that multiply to 8 and add up to - 9

Question

Mathematics

Sebastian Pollard

23 June, 01:52

What are two numbers that multiply to 8 and add up to - 9

+1

Answers (1)

Know the Answer?

Krista Ray · Answer 1

Step-by-step explanation:

xy = 8

x + y = - 9

Solve with substitution.

y = - x - 9

x (-x - 9) = 8

-x² - 9x = 8

0 = x² + 9x + 8

0 = (x + 1) (x + 8)

x = - 1 or - 8

y = - 8 or - 1

The two numbers are - 1 and - 8.