tinaphilemond tinaphilemond
  • 11-03-2017
  • Mathematics
contestada

Factor this quadratic expression:
a2 - 2a - 15

Respuesta :

Аноним Аноним
  • 11-03-2017
a² - 2a - 15
= a² - 5a + 3a - 15
= a(a-5) + 3(a-5)
= (a-5)(a+3)



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charlottekrist
charlottekrist charlottekrist
  • 11-03-2017
a^2-2a-15

1. Ask: Which two numbers add up to -2 and multiply to -15?
-5 and 3

2. Rewrite the expression using the above
(a-5)(a+3)

Have a nice day :D
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