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bazaltina [42]
3 years ago
8

Factor –8x3 – 2x2 – 12x – 3 by grouping. What is the resulting expression?

Mathematics
2 answers:
Goryan [66]3 years ago
7 0

Answer:

The resulting expression is (4x+1)(-2x^2-3)

Step-by-step explanation:

Consider the provided expression.

-8x^3-2x^2-12x-3

The above expression can be written as:

(-8x^3-2x^2)+(-12x-3)

Take out the greatest common factor from each group.

-2x^2(4x+1)-3(4x+1)

Further solve the above expression.

(4x+1)(-2x^2-3)

Hence, the required expression is

(4x+1)(-2x^2-3)

The resulting expression is (4x+1)(-2x^2-3)

mote1985 [20]3 years ago
4 0

The answer is (-4x-1)(2x^2+3) when factoring this expression by grouping

   

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Estimate the square root to the nearest integer and tenth square root of 8
Sever21 [200]

Answer:

√

8

≈

3

Explanation:

Note that:

2

2

=

4

<

8

<

9

=

3

2

Hence the (positive) square root of  

8

is somewhere between  

2

and  

3

. Since  

8

is much closer to  

9

=

3

2

than  

4

=

2

2

, we can deduce that the closest integer to the square root is  

3

.

We can use this proximity of the square root of  

8

to  

3

to derive an efficient method for finding approximations.

Consider a quadratic with zeros  

3

+

√

8

and  

3

−

√

8

:

(

x

−

3

−

√

8

)

(

x

−

3

+

√

8

)

=

(

x

−

3

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2

−

8

=

x

2

−

6

x

+

1

From this quadratic, we can define a sequence of integers recursively as follows:

⎧

⎪

⎨

⎪

⎩

a

0

=

0

a

1

=

1

a

n

+

2

=

6

a

n

+

1

−

a

n

The first few terms are:

0

,

1

,

6

,

35

,

204

,

1189

,

6930

,

...

The ratio between successive terms will tend very quickly towards  

3

+

√

8

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So:

√

8

≈

6930

1189

−

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2.828427

8 0
3 years ago
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Zina [86]

Answer:

she spent like 40% of her time easy

Step-by-step explanation:

that was like 3rd grade

8 0
2 years ago
Read 2 more answers
Can I get some help please
Mamont248 [21]
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3 0
3 years ago
In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. Suppose 200 adults from th
cricket20 [7]

Answer: 0.0793

Step-by-step explanation:

Let the IQ of the educated adults be X then;

Assume X follows a normal distribution with mean 118 and standard deviation of 20.

This is a sampling question with sample size, n =200

To find the probability that the sample mean IQ is greater than 120:

P(X > 120) = 1 - P(X < 120)

Standardize the mean IQ using the sampling formula : Z = (X - μ) / σ/sqrt n

Where;  X = sample mean IQ; μ =population mean IQ; σ = population standard deviation and n = sample size

Therefore, P(X>120) = 1 - P(Z < (120 - 118)/20/sqrt 200)

                                 = 1 - P(Z< 1.41)

The P(Z<1.41) can then be obtained from the Z tables and the value is 0.9207

Thus; P(X< 120) = 1 - 0.9207

                          = 0.0793

3 0
3 years ago
What is the possible rational roots for this polynomial 6x³+5x²+10x+3=0
8090 [49]

Answer:

See below.

Step-by-step explanation:

Using the Rational Roots Theorem:

Factors of 3:   1, 3  ( = p).

Factors of 6:  1,2,3,6 ( = q).

Possible real  roots are a 1 or 3 from  p / q = +/- 1/1, +/- 3/1 , +/-1/2,  +/- 1/3 , +/- 1/6, +/- 3/2.

3 0
2 years ago
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