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kondaur [170]
3 years ago
9

If f (x) = 9x squared + 6x - 8, then f (-2) = ?​

Mathematics
2 answers:
Reika [66]3 years ago
7 0

Answer:

f(-2)=​16

Step-by-step explanation:

f(x)=9x^2+6x-8

f(-2)=​9(-2)^2+6(-2)-8

f(-2)=​9(4)+6(-2)-8

f(-2)=​36-12-8

f(-2)=​24-8

f(-2)=​16

marusya05 [52]3 years ago
6 0

Answer:

gtvgvghhhhhh

gggyhhvfyhyjjhbu

yjnbgjjbvyhnvfhyuyujhgujn

hhjhu

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Answer:

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8 0
2 years ago
-/2 points
Rom4ik [11]

Answer:

Part 1) The domain of the quadratic function is the interval  (-∞,∞)

Part 2) The range is the interval  (-∞,1]

Step-by-step explanation:

we have

f(x)=-x^2+14x-48

This is a quadratic equation (vertical parabola) open downward (the leading coefficient is negative)

step 1

Find the domain

The domain of a function is the set of all possible values of x

The domain of the quadratic function is the interval

(-∞,∞)

All real numbers

step 2

Find the range

The range of a function is the complete set of all possible resulting values of y, after we have substituted the domain.

we have a vertical parabola open downward

The vertex is a maximum

Let

(h,k) the vertex of the parabola

so

The range is the interval

(-∞,k]

Find the vertex

f(x)=-x^2+14x-48

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f(x)=-(x^2-14x)-48

Complete the square

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f(x)=-(x^2-14x+49)+1

Rewrite as perfect squares

f(x)=-(x-7)^2+1

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therefore

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6 0
3 years ago
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3 years ago
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