rexdshaw
rexdshaw rexdshaw
  • 07-06-2017
  • Mathematics
contestada

i need the answer to this question please

i need the answer to this question please class=

Respuesta :

Аноним Аноним
  • 07-06-2017
x^2 + x < 20
x^2 + x - 20 <0
set the left side equal 0

(x+5)(x-4) = 0
x + 5 = 0; x = -5
x - 4 = 0 ; x = 4

so solutions:
x has to be between -4 and 5 means
-5 < x < 4
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