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Lady bird [3.3K]
3 years ago
15

Factor 2x^3+3x^2-23x-12, given that x+4 is a factor

Mathematics
2 answers:
Paraphin [41]3 years ago
6 0
Hello,
2x^3+3x^2-23x-12\\
=2x^3+8x^2-5x^2-20x-3x-12\\
=2x^2(x+4)-5x(x+4)-3(x+4)\\
=(x+4)(2x^2-5x-3)\\
=(x+4)(2x^2-6x+x-3)\\
=(x+4)[2x(x-3)+1(x+3)]\\
=(x+4)(x-3)(2x+1)
Alex73 [517]3 years ago
5 0
<span>(2x + 1) • (x - 3) • (x + 4)</span>
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Tyna simplified the expression StartFraction 3 x cubed Over 12 x Superscript negative 2 Baseline EndFraction to StartFraction x
Yuki888 [10]

Answer:

She divided the coefficients incorrectly

Step-by-step explanation:

A. She divided the coefficients incorrectly.

B. She added the exponents instead of subtracting them.

C. She divided the coefficients instead of subtracting them.

D. She subtracted the exponents instead of dividing them.

Correct calculation:

3x³/12x^-2

= 3x³ ÷ 12x^-2

= 3x³ ÷ 1/12x²

= 3x³ × 12x²/1

= 36x^5

Tyna's calculation:

3x³/12x^-2 = x/4

3 0
2 years ago
Stewart wants to save for retirement and also pay off his mortgage. Each year, he has an extra $5,000. Should he put that extra
Evgesh-ka [11]

A) Yes, The tax benefits of Homeonership are similar to IRA tax breaks..!

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7 0
3 years ago
On Saturday morning, Ahmed decided to take a bike ride from one end of the 15-mile bike trail to the other end of the bike trail
frosja888 [35]

The expression which relates the total time taken and the time taken for the trip is [15s + 15(s+2)] / s² + 2s and 2.32 hours respectively.

<em>Travel time = distance ÷ speed </em>

<u>Second half of the trip</u> :

  • <em>Speed = s mph</em>

  • <em>Distance covered = 15 miles</em>

<u>Time taken for second half of trip</u> :

Time taken = 15 / s

<u>First half of the trip</u> :

  • <em>Speed = s + 2 mph </em>

<u>Time taken for first half of trip :</u>

Time taken = 15 / (s+2)

<u>Total time taken :</u>

<em>First half + second half</em>

15/(s+2) + 15/s = [15s + 15(s+2)] / s² + 2s

B)

If s = 12

<em>Substitute s = 12 into the expression</em> :

[15(12) + 15(12+2)] / 12² + 2(12)

[180 + 210] / 144 + 24

390 / 168

= 2.32 hours

Therefore, the total time taken is 2.32 hours.

Learn more : brainly.com/question/18796573

3 0
2 years ago
Simplify 4^9/4^3<br>A 4^5<br>B 4^6<br>C 4^12<br>D 4^27<br>​
FinnZ [79.3K]

Answer:

the answer there is B. 4^6

Step-by-step explanation:

you would subtract the exponents

5 0
3 years ago
If triangle ACD ~ triangle ABE, find the value of x.
alina1380 [7]
Answer:

x = 16

Explanations:

Since △ACD ~ △ABE, it means that:

CD/AD = BE/AE..........(*)

CD = 3x + 8

AD = AE + ED

AD = (x - 1) + 27

AD = x + 26

BE = 20

AE = x - 1

Substituting CD, AD, BE, and AE into equation (*)

(3x+8)/(x+26) = 20/x-1

Cross multiply:

(3x+8)(x-1) = 20(x+26)

3x² - 3x + 8x - 8= 20x + 520

3x²- 15x - 528 = 0

Divide through by 3

x² - 5x - 176 = 0

Solving the quadratic equation above for the values of x

x² - 16x + 11x - 176 = 0

x(x - 16) + 11 (x - 16) = 0

(x - 16)(x + 11) = 0

If x - 16 = 0

x = 16

If x + 11 = 0

x = -11

x cannot be -11 because x = -11 will make side CD and AE to be negative, and the sides of a triangle cannot be negative.

Therefore, x = 16

5 0
1 year ago
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