4 years ago

If 3x + 4 = -5 what is the value of x2 - 4x?

Mathematics

1 answer:

Ratling [72]4 years ago

4 0

Hope this helps you!!

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Given f(x) = x^2 – 3x – 2, what is f(5)?

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Step-by-step explanation:

Given function: $f(x)=x^2-3x-2$

To find $f(5)$ , simply input $x=5$ into the function:

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Help pls and explain thank you :)

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<img src="https://tex.z-dn.net/?f=%20-%20x%20-%202%20%5Cdiv%20x%28x%20%7B%7D%5E%7B2%7D%20%20-%204%29" id="TexFormula1" title=" -

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Answer:

Step-by-step explanation:

Hello,

First of all we will take any real number x different from 0, -2, +2 as dividing by 0 is not allowed and then we can write

$\dfrac{( - x - 2)}{x(x^2 - 4)}=-\dfrac{x+2}{x(x-2)(x+2)}=\large \boxed{ -\dfrac{1}{x(x-2)}}$

because we know that

$x^2-4=x^2-2^2=(x-2)(x+2)$

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

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