yantreledwards1234 yantreledwards1234
  • 08-01-2019
  • Mathematics
contestada

One x-intercept for a parabola is a point (1.25,0).use the Quadratic formula to find the other x-intercept for the parabola defined by this equation y=4x^2-9x+5

Respuesta :

jimrgrant1 jimrgrant1
  • 08-01-2019

Answer:

(1, 0 )

Step-by-step explanation:

for 4x² - 9x + 5

with a = 4, b = - 9 and c = 5

Using the quadratic formula with these values, then

x = ( 9 ± [tex]\sqrt{(-9)^2-(4(4)(5)}[/tex]) / 8

  = ( 9 ± [tex]\sqrt{81-80}[/tex] ) / 8

  = ( 9 ± 1 ) / 8

x = [tex]\frac{9+1}{8}[/tex] = [tex]\frac{10}{8}[/tex] = 1.25

or x = [tex]\frac{9-1}{8}[/tex] = [tex]\frac{8}{8}[/tex] = 1

hence the other x- intercept = (1, 0 )


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