3 years ago

What is the domain of the function f(x)=x(x+4)

Mathematics

1 answer:

Serjik [45]3 years ago

8 0

domain all real number

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If f(x) = 3x2 - x, find f(-2). 10 14 38

mojhsa [17]

f(x) = 3x^2-x

F(-2)

replace x with -2

3(-2)^2 - -2 =

3*4 +2 = 14

Answer is 14

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3 years ago

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You flip a coin and then roll a fair six-sided die. The coin lands heads-up and the die shows an even number.

NNADVOKAT [17]

Answer:

1/6

Step-by-step explanation:

If you're asking for the probability that the coin is heads and the die is even. Hope this helps :)

1/3*1/2= 1/6

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3 years ago

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I need help show your work

Vlad1618 [11]

If x = 2 than, 6(4x2)=48
-3(8x)= -24
It would equal 24

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3 years ago

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3m-2x for m = 5 and x = 4

kipiarov [429]

M = 5 and x = 4

3(5) - 2(4)
15 - 8 = 7

I hope this helps!

3 0

3 years ago

Find all the zeroes of the equation(with simple steps).

uysha [10]

Answer-

The zeros are, $5,\ -5,\ 4i,\ -4i$

Solution-

$\Rightarrow -3x^4+27x^2+1200=0$

$\Rightarrow -3(x^2)^2+27(x^2)+1200=0$

Here,

a = -3, b = 27, c = 1200

So,

$x^2=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

$=\dfrac{-27\pm \sqrt{-27^2-4\cdot (-3)\cdot 1200}}{2\cdot (-3)}$

$=\dfrac{-27\pm \sqrt{729+14400}}{-6}$

$=\dfrac{-27\pm 123}{-6}$

$=\dfrac{-27+123}{-6},\ \dfrac{-27- 123}{-6}$

$=\dfrac{96}{-6},\ \dfrac{-150}{-6}$

$=-16,\ 25$

So,

$\Rightarrow x^2=25,\ -16$

$\Rightarrow x=\sqrt{25},\ \sqrt{-16}$

$\Rightarrow x=5,\ -5,\ 4i,\ -4i$

8 0

3 years ago