heavenmontalvo heavenmontalvo

23-08-2018
Mathematics

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Need some help (: thanks!
Consider the quadratic equation below. (4x+z)(3x-w)=0
If w=21, determine an x-intercept of the parabola represented by this equation.
A) (21,0)
B) (-7,0)
C) (-21,0) or D) (7,0)

Respuesta :

WojtekR WojtekR

23-08-2018

We know that w = 21 so:

[tex] (4x+z)(3x-w)=0\\\\(4x+z)(3x-21)=0\\\\3x-21=0\\\\3x=21\qquad|\div3\\\\\boxed{x=7} [/tex]

Answer D) (7;0)

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