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3 years ago

Pls help!!! Will mark BRAINLEST if correct

Mathematics

2 answers:

elixir [45]3 years ago

8 0

a and b i hope this is correct

klasskru [66]3 years ago

6 0

3 square root 2
4 square root 3
Your answer is C and C

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La desigualdad para comparar los numeros 11 y ‐9

BaLLatris [955]

Answer:

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Step-by-step explanation:

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3 years ago

Find all solutions to x³+3x² − 9x − 27 = 0 by factoring the equation.

SCORPION-xisa [38]

Answer:

The solutions are $x=-3,\:x=3$

Step-by-step explanation:

To factor this cubic polynomial $x^3+3x^2-9x-27$ you must:

Group the polynomial into two sections

$x^3+3x^2-9x-27=\left(x^3+3x^2\right)+\left(-9x-27\right)$

Factor out -9 from $(-9x-27)$

$(-9x-27)=-9\left(x+3\right)$

Factor out $x^2$ from $(x^3+3x^2)$

$(x^3+3x^2)=x^2\left(x+3\right)$

$x^3+3x^2-9x-27=-9\left(x+3\right)+x^2\left(x+3\right)$

Factor out common term $x+3$

$-9\left(x+3\right)+x^2\left(x+3\right)=\left(x+3\right)\left(x^2-9\right)$

$x^3+3x^2-9x-27=\left(x+3\right)\left(x^2-9\right)$

Factor $x^2-9$

$x^2-9=\left(x+3\right)\left(x-3\right)$

$x^3+3x^2-9x-27= \left(x+3\right)\left(x+3\right)\left(x-3\right)$

$x^3+3x^2-9x-27=\left(x+3\right)^2\left(x-3\right)=0$

Using the Zero Factor Theorem: = 0 if and only if = 0 or = 0

$x+3=0, \quad{x=-3}\\x-3=0, \quad{x=3}$

The solutions are

$x=-3,\:x=3$

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3 years ago

4. Multiply. Write each answer in simplest form: (-3/4)(1/2)(-2/3)

m_a_m_a [10]

Step-by-step explanation:

6/24

=1/4

;)

;(

;]

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3 years ago

Fill out the ratio table boys 20 and girls 120

Gennadij [26K]

Answer:6

Step-by-step explanation:

You will divide 120/20

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3 years ago

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Rashid [163]

Answer:

a. _ √20 , about 4.472136

b - (-3, 8)

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Step-by-step explanation:

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3 years ago

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