yanvuerapena44 yanvuerapena44
  • 23-05-2017
  • Mathematics
contestada


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

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apologiabiology
apologiabiology apologiabiology
  • 23-05-2017
complete the square
factor out linear coefient
f(x)=7(x^2+6x)
take 1/2 of linear coefient and square it and add negative and positive to inside
6/2=3, 3^2=9

f(x)=7(x^2+6x+9-9)
complete squre
f(x)=7((x+3)^2-9)
expand
f(x)=7(x+3)^2-63 is veretx form
vertex is (-3,-63)
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jessemm1211 jessemm1211
  • 20-05-2019

Answer:

The answer is D

Step-by-step explanation:

Answer Link

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