felicia0828 felicia0828
  • 02-08-2022
  • Mathematics
contestada

Let r(x)=x^2 - x + 14. Find all values of a such that r(a) = 20.

Respuesta :

parsahosseinal14 parsahosseinal14
  • 02-08-2022

Answer:

a=–2, 3

Step-by-step explanation:

r(a)=20

a²–a+14=20===> a²–a–6=0===> (a–3)(a+2)

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