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Jennifer made an error converting y=x^2 + 2z +7 to vertex form. In which step sis she make an error? Explain your answer and provide the correct form of the question in vertex form.

Jennifer made an error converting yx2 2z 7 to vertex form In which step sis she make an error Explain your answer and provide the correct form of the question i class=

Respuesta :

MathPhys

Answer:

C

Step-by-step explanation:

Jennifer completed the square by adding 1.  However, to keep both sides equal, she should have added 1 to both sides:

y + 1 = (x² + 2x + 1) + 7

Or, she should have added 1 and subtracted 1 from the same side.

y = (x² + 2x + 1) + 7 − 1

The correct vertex form of the equation is:

y = (x + 1)² + 6