What is the vertex form of #y= - 3x^2 - 12x - 7 #?

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Answer 1 · 2017-04-17T14:00:06

#"The vertex form is "y=-3(x+2)^2+5#

#y=-3x^2-12x-7#

#y=-3x^2-12xcolor(red)(-12+12)-7#

#y=-3x^2-12x-color(red)(12)+5#

#y=-3(color(green)(x^2+4x+4))+5#

#color(green)(x^2+4x+4)=(x+2)^2#

#y=-3(x+2)^2+5#