Question

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

f(x) = 7(x + 6)2 – 6
f(x) = 7(x + 6)2 – 42
f(x) = 7(x + 3)2 – 9
f(x) = 7(x + 3)2 – 63

Answer 1

Heres and explanation that might help you understand how to solve this type of problems
https://brainly.com/question/1391868

Answer 2

f(x) = 7x2 + 42x

factor out the 7 to get f(x) = 7(x^2+6x)

divide the b term by 2 and square the result to get 9 (this will create a perfect square)

add 9 to the inside of the brackets

7(x^2+6x+9)

subtract 7*9 from the outside to keep the equation equal

7(x^2+6x+9) - 63

then finish up the factorization

(Credits- https://questioncove.com/updates/5a0f12d56e6951ee5b590c00)

Answer 3

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Answer 4

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