dani698114
dani698114
07-03-2014
Mathematics
contestada
Whats the vertex form of y=x^2-20x+15
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bglotr
bglotr
07-03-2014
this looks like a parabola so:
y=x^2 - 20x + 15 --> x^2 - 20x +15=y
(x^2 -20x)=y - 15 --> (x - 10)^2=y - 15 +100 ( used complete the square)
(x - 10)^2=y + 85
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