Find f(-2) for the function f(x) = 3r2 - 2x +7. 0-13 O-1 O 1 O 23

Mathematics

1 answer:

viva [34]3 years ago

8 0

Step-by-step explanation:

f(x) = 3x² - 2x + 7

f(-2) = 3(-2)² -2(-2) + 7

= 3(4) + 4 + 7

= 23

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Can somebody explain this in a basic way and help me graph it??!!

7nadin3 [17]

Hello!

To graph this, you will want to create two points based off of the equation. You plug an x-value into the equation, and you put the y-value outcome with it as an ordered pair. You do this twice, giving you two points to connect.

For example, let's plug in an x-value 1, giving us (1,y)

y= 1-3 (We remove the absolute value)

y=-2 (Subtract)

This gives us one point, (1,-2)

Let's try using -2 as another point.

y= 2-3 (Remove absolute value)

y= -1 (Subtract)

This gives us the point (-2,-1)

To graph, you would draw a straight line through the points (1,-2) and (-2,-1). Note you could do this with any x-value and you would get the same line.

I hope this helps!

3 0

3 years ago

Read 2 more answers

Distance between 1,-4and 7,-4 on a coordinate grid

MAXImum [283]

Answer:

6 units.

Step-by-step explanation:

Distance = √ [(7 - 1)^2 + (-4-(-4))^2]

= √(36 + 0)

= 6 units.