Mathematics
madisonbryant25
2016-09-19 23:58:09
What is the x-coordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?
ANSWERS
Kalyn559
2016-09-20 01:33:35

hello : y = 3x²+9x    = 3(x² + 3x )    = 3 ( x² +2(3/2)x +(3/2)²) -(3/2)²)    = 3((x+3/2)² -9/4) y = 3 (x+3/2)² -27/4 the x-coordinate of the vertex  is : - 3/2

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