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What is the vertex of # y= -2x^2-2x-6+3(x-1)^2#?

1 Answer

Dec 9, 2015

#y=(x-4)^2-19#

Explanation:

#y=-2x^2-2x-6+3x^2-6x+3#

#y=x^2-8x-3#

Use completing square

#y+16=x^2-8x+4^2-3#

#y+16=(x-4)^2-3#

#y=(x-4)^2-19#

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