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3 years ago

Determine whether −2 is a zero (root) of the function:

Mathematics

2 answers:

lianna [129]3 years ago

5 0

Answer:

The answer to your question is No

Step-by-step explanation:

Data

function f(x) = 2x³ + x² - 10x - 12

To know if a number is a root of a function, evaluate the function on that number, if the result is zero, then that number is a root.

Substitution

f(-2) = 2(-2)³ + (-2)² - 10(-2) - 12

Simplification

f(-2) = 2(-8) + 4 + 20 - 12

f(-2) = -16 + 4 + 20 - 12

f(-2) = -28 + 24

f(-2) = -4

-2 is not a root that the function.

gregori [183]3 years ago

4 0

Answer:

Step-by-step explanation:

Using factor theorem

If the remainder is 0, it is a root

2(-2)³ + x(-2)² − 10(-2) − 12

-4

Since the remainder is non-zero, it is not a root

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ioda

Answer:

Step-by-step explanation:

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2 years ago

In this unit, you studied a handful of circle theorems. However, there are other circle theorems not covered in this unit or cou

Lerok [7]

It should be noted that the angle at the center of the circle is twice the angle at the circumference.

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2 years ago

What is the slope of a line that goes through the points (2, 5) and (8, 6) ?

jenyasd209 [6]

Answer:

m = 1 / 6

Step-by-step explanation:

Use this formula y2 - y1 / x2 -x1 to find the slope.

6 - 5 / 8 -2 = 1/6

8 0

2 years ago

Gloria deposited $500 into a bank account that earned 7.5% simple interest each year. She earned $225 in interest before closing

pav-90 [236]

T = 6 years

Equation:
t = (1/r)(A/P - 1)
Calculation:
First, converting R percent to r a decimal
r = R/100 = 7.5%/100 = 0.075 per year,
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t = (1/0.075)((725/500) - 1) = 6
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The time required to get
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3 years ago

A car travels at a constant speed. What is the cars speed between checkpoints expressed as a unit rate? Checkpoint As time being

seropon [69]

Checkpoint A-> time being 1:00pm total miles driven being 120 and

checkpoint B-> time being 3:00pm and the total miles being 208

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We need to find car speed between the checkpoints

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$speed = \frac{Distance}{time}$