3 years ago

If f(x)=3x^2-2x+5, find (-2)

Mathematics

1 answer:

WITCHER [35]3 years ago

8 0

The answer is 21...3x^2=12 -2×=4 and add 5

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Answer:

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Step-by-step explanation:

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$f(x)=8x^{2}-4x+11$

This is a vertical parabola open upward (because the leading coefficient is positive)

The vertex is a minimum

Convert to vertex form

Factor the leading coefficient

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Complete the square. Remember to balance the equation by adding the same constants to each side.

$f(x)=8(x^{2}-\frac{1}{2}x+\frac{1}{16})+11-\frac{1}{2}$

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Rewrite as perfect squares

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