sarissal
sarissal sarissal
  • 16-03-2020
  • Mathematics
contestada

Solve for x.
X 2+ 4x-21 = 0


A.-3,-7
B. -3,7
C.3,-7
D.3,7

Respuesta :

kategins
kategins kategins
  • 16-03-2020
answer: C
explanation: when you simplify the quadratic you get (x+7)(x-3), so the roots are -7 and 3
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