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Aliun [14]
3 years ago
12

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

Mathematics
1 answer:
vovikov84 [41]3 years ago
8 0

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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4 years ago
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