nicolewillis504 nicolewillis504
  • 02-12-2019
  • Mathematics
contestada

Write the quadratic equation whose roots are -5 -4 and whose leading coefficient is 4

Respuesta :

jimrgrant1 jimrgrant1
  • 02-12-2019

Answer:

y = 4x² + 36x + 80

Step-by-step explanation:

Since the roots are x = - 5 and x = - 4 then the factors are

(x + 5) and (x + 4)

The equation is the product of the factors

y = (x + 5)(x + 4) and with leading coefficient of 4 is

y = 4(x + 5)(x + 4) ← expand factors

  = 4(x² + 9x + 20)

  = 4x² + 36x + 80

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