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i need to help write the equation in vertex form for the parabola with vertex at ( 2,-1) and y - intercept 5

i need to help write the equation in vertex form for the parabola with vertex at 21 and y intercept 5 class=

Respuesta :

Answer: y= 5/2(x-2)^2 - 1

Step-by-step explanation:

y=a(x-2)^2 - 5

5=a(0-2)^2 - 5

10=a(-2)^2

10=a4

a=10/4 or 5/2

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