19-03-2021
Mathematics

contestada

what is the x-coordinate of the vertex of the parabola whose equation is y=3×^2+9×

Respuesta :

21-03-2021

Answer:

Step-by-step explanation:

y = 3x² + 9x

= 3(x² + 3x)

= 3(x² + 3x + 1.5²) -3·1.5²

= 3(x+1.5)² - 6.75

vertex (-1.5, -6.75)

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