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orlando19882000
06.05.2020 •
Mathematics
Find the equation of the parabola with its focus at (-5,0) and its directrix y=2
a.) y=-1/4(x+5)^2+1
b.) y=1/4(x+5)^2+1
c.) y=-1/4(x+1)^2+5
d.) y=-4(x+5)^2+1
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Ответ:
(1.5,0)
(.5,0)
Step-by-step explanation:
Quadratic formula below
We first need to move everything to one side of the equation
4x²-8x+3=0
Then plug everything in
(8±√(-8²-4*4*3))/(2*4)
(8±√16)/8
To calculate the ± we need to do when where it's adding and then negative
we have
(8+4)/8=3/2
and hten
(8-4)/8=1/2