Respuesta :

silirobert15

To make a perfect square of v² - 14v , add c such that:

We have:

  • a = 1
  • b = - 14
  • c = b²/ (4a) = (-14)²/ (4 × 1) = 49

⇒ v² - 14v + 49 = (v - 7)(v - 7) = (v - 7)²

Answer: 49

OK done. Thank to me :>