leirbagaicnelav970
leirbagaicnelav970 leirbagaicnelav970
  • 03-03-2020
  • Mathematics
contestada

y = x2 + 5x + 4

How do I factor

Respuesta :

orlaith2005
orlaith2005 orlaith2005
  • 04-03-2020

Answer:

(x + 1) * (x + 4)

Step-by-step explanation:

y = x² + 5x + 4

First, you multiply the first coefficient by the third coefficient: 4

Then you find all the factors of 4:

  • 1, 4
  • -1, -4
  • 2, 2
  • -2, -2

Of all these factors, you must find the pair that adds to 5 (the second coefficient)

Those factors are:  1 and 4

Then you put those into (x+_) and multiply them together:

( x + 1 ) * ( x + 4 )

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