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dimulka [17.4K]
3 years ago
13

Christian is rewriting an expression of the form y = ax2 + bx + c in the form y = a(x – h)2 + k. Which of the following must be

true?
h and k cannot both equal zero
k and c have the same value
the value of a remains the same
h is equal to one half –b
Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
6 0

Answer:

the value of a remains the same

Step-by-step explanation:

just took the Transformations of Quadratic Functions quiz on 3dgenuity !

notsponge [240]3 years ago
3 0
"h and k cannot both equal zero" -- yes, it can. if the vertex of a parabola is at (0, 0), there's nothing incorrect/invalid about that!!

"k and c have the same value" -- k and c do not have the same value. "k" is the y-value of the vertex and c is the constant in your quadratic equation, and the constant is not necessarily the y-value.

"the value of a remains the same" -- this is true. the a's in your equations are the same values, because the a-value is the coefficient of the x-variable in both equations. y = a(x - h)^2 and y = ax^2 -- both of these have a applying to your x-variables.

"h is equal to one half -b" -- this isn't true. the formula for calculating the x value of the vertex (h is the x-value of the vertex) is h = (-b/2a). -b/2a is not the same as one half -b because this answer choice doesn't involve the a-value.
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