Seudónimo Seudónimo
  • 09-02-2022
  • Mathematics
contestada

What multiplies to give you 15 and adds to give you -8?

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Matheuxxxx
Matheuxxxx Matheuxxxx
  • 09-02-2022

Answer:

-5 and -3 because if you multiply both the answer is 15 and if you plus both the answer is -8.

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blackshades
blackshades blackshades
  • 09-02-2022
Answer:

Step-by-step explanation:
Take one number as x.

Given,
x + ? = -8
? = - 8 - x

So, second number is -8 - x

Now,
x ( -8 - x) = 15
-8x - x² = 15
-8x - x² - 15 = 0
-x² - 8x - 15 = 0
(-x² - 3x) + (5x - 15) = 0
x (-x - 3) + 5 (-x - 3) = 0
(- x - 3)(x + 5) = 0

•°• x = -3 & x = -5

=》The required numbers are - 3 & - 5.



Hope it helps ⚜





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