3 years ago

What is f(x) = 7x2 + 42x written in vertex form?

1 answer:

6 0

F(x)= 7 x² + 42 x = 7 ( x² + 6 x ) = 7 ( ( x² + 6 x + 9 ) - 9 ) =
= 7 ( x + 3 )² - 63 (vertex form)
Answer: D)

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