3 years ago

What is f(x)=3x^2-18x+23 into vertex form

1 answer:

5 0

$3x^2-18x+23=3(x^2-6x)+23=3(x^2-6x+9-9)+23$
$\quad=3((x-3)^2-9)+23=3(x-3)^2-27+23=3(x-3)^2-4$

The vertex is then $(3,-4)$ .

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2 years ago

Where were some of the first tunnels built

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2 years ago

Flying against the wind, an airplane travels 4340 kilometers in 7 hours. Flying with the wind, the same plane travels 3120 kilom

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The rate of the wind is given to be 210 the rate of the plane in mid air is given as 830

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= 620

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