SOLUTION: The vertex form of the equation of a parabola is y = 2(x + 4)2 - 21. What is the standard form of the equation?

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Question 1039873: The vertex form of the equation of a parabola is y = 2(x + 4)2 - 21.
What is the standard form of the equation?
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
The standard form is y=ax%5E2%2Bbx%2Bc
Use the formula %28a%2Bb%29%5E2=a%5E2%2B2ab%2Bb%5E2
y=2%28x%5E2%2B8x%2B16%29-21
Open the brackets
y=2x%5E2%2B16x%2B32-21
y=2x%5E2%2B16x%2B11
Answer: y=2x%5E2%2B16x%2B11