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Nostrana [21]
3 years ago
12

Which are real zeroes of this function? x3 + 2x2 – 9x – 18

Mathematics
1 answer:
stepan [7]3 years ago
5 0
<h2>Hello!</h2>

The answer is:

E. -2, 3, -3

<h2>Why?</h2>

To find the zeroes of the function, we just need to evaluate the given values and check if the function/expression tends to 0.

We are given the function

f(x)=x^{3}+2x^{2}-9x-18

Now, to find the zeroes, we need to substitute the values, so, substituting the values of the option E, we have:

First value, -2:

f(-2)=-2^{3}+2*(-2)^{2}-9*(-2)-18

f(-2)=-8+2*4+18-18

f(-2)=-8+8+18-18=0

Second value, 3:

f(3)=3^{3}+2*(3)^{2}-9*(3)-18

f(3)=27+2*9-27-18

f(3)=27+18-27-18=0

Third value, -3:

f(-3)=-3^{3}+2*-3^{2}-9*-3-18

f(-3)=-27+2*9+27-18

f(-3)=-27+2*9+27-18=0

Hence, we have that evaluating the values of the option E, the function tends to 0.

So, the correct option is: E. -2, 3, -3

Have a nice day!

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in three plays of a football game, there is a gain of 4 yards, a loss of 9 yards, and a gain of 15 yards. What number can you us
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We can use minus(-) sign i.e. -9 to represent loss of 9 yards.

<h3>Write the difference between gain and loss.</h3>

The word “gain” implies “acquiring something”.

Gain means to acquire something one desires especially because of one’s efforts.

Gain means to get something additional, for example, to gain more speed, to gain more weight.

We can denote gain by using plus(+) sign before the given number.

“Loss” generally means “to lose something one already has.”

Loss means the deprivation from keeping something, for example, bearing the loss of a theft.

It refers to something which is lost, for example, the theft of jewelry was a great loss.

We can denote loss by using minus(-) sign before the number.

In the given question it is said that there is gain of 4 yards, loss of 9 yards and gain of 15 yards.

It is asked that how would we represent 9 yards loss.

We know that we use minus(-) sign to represent loss.

So we can represent loss of 9 yards by writing it as -9.

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brainly.com/question/18281564

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1 year ago
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