Find the zeros of the function. f(x) = 9x^3 + 18 x^2 - 135x

1 answer:

6 0

Where f(x)=0 is the zeros of the funciton

factor out the common factor of all of them which is 9x
f(x)=9x(x^2+2x-15)
what 2 numbers multiply to get -15 and add to get 2?
5 adn -3

f(x)=(9x)(x+5)(x-3)
set to zero
9x=0
x=0

x+5=0
x=-5

x-3=0
x=3

zeroes at x=-5, 0,3

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Vilka [71]

Answer:

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Step-by-step explanation:

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If Gage gets 40 bucks a month how much months would it take him to get 300 bucks.

USPshnik [31]

Answer:

7 to 8 months / most probably 8 months

7.5 months to be exact

Step-by-step explanation:

Hi there!! Let's work!

So lets Break it down,

Given: $40 every month

Prove: How many months till he has in total $300

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<h2>We need to multiply the number of months to 40 to get 300</h2>

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<h3>So lets refer to a multiplication chart to make it easier:</h3>

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<h3>Here is an example of the equation we will use:</h3>

<u>400 x (months) = $300 / (or how much ever we get)</u>

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We have 2 final equations because we don't have a straight forward answer. (Refer to explanation below)

40 x 7 = 280

and

40 x 8 = 320

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So in problems like these we have to think like we would in real life, if you have an option you can write 7 to 8 months or you should write 8 instead of seven since they may be asking for a specific amount of months and after 8 months Gage will reach (surpass) his goal of $300 by $20.

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