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Its vertex is (2,-4) and another point (-1,2) on the parabola Write an equation of the parabola.

User EduSanCon
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Explanation:

Start with vertex form of the parabola

y = a ( x-2)^2 -4 then sub in the point (-1,2) to find the value of 'a'

2 = a ( -1-2)^2 - 4

so a = 2/3

y = 2/3 ( x-2)^2 -4

User Tijin
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