1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
geniusboy [140]
3 years ago
8

Please help!! What Find the Error and explain why it is wrong!

Mathematics
1 answer:
Nata [24]3 years ago
8 0

Answer:

First image attached

The error was done in Step E, because student did not multiply 2\cdot x -8 by the negative sign in numerator. Step E must be \frac{2\cdot x -5}{(x+4)\cdot (x-4)}.

Second image attached

The error was done in Step C, because the student omitted the 2\cdot a \cdot b of the algebraic identity (a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}. Step C must be 5\cdot x = x^{2}+4\cdot x + 4

Step-by-step explanation:

First image attached

The error was done in Step E, because student did not multiply 2\cdot x -8 by the negative sign in numerator. The real numerator in Step E should be:

3-(2\cdot x -8)= 3-2\cdot x+8 = 11-2\cdot x

Hence, Step E must be \frac{2\cdot x -5}{(x+4)\cdot (x-4)}.

Second image attached

The error was done in Step C, because the student omitted the 2\cdot a \cdot b of the algebraic identity (a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}. Step C must be 5\cdot x = x^{2}+4\cdot x + 4

And further steps are described below:

Step D

x^{2}-x+4 = 0

Which according to the Quadratic Formula, represents a polynomial with complex roots. That is: (a = 1, b = -1, c = 4)

D = b^{2}-4\cdot a\cdot c

D = (-1)-4\cdot (1)\cdot (4)

D = -17 (Conjugated complex roots)

Step E

(x-0.5-i\,1.936)\cdot (x-0.5+i\,1.936) = 0

Step F

x = 0.5+i\,1.936\,\lor\,x = 0.5-i\,1.936

You might be interested in
Radical form of f(x)=3+2 in X
kondor19780726 [428]
The answer would be -17 because i know
6 0
3 years ago
Does this represent quntitites that are proportional
Yuki888 [10]

Answer:

B

Step-by-step explanation:

Not all of the pairs represent the same ratio

6 0
1 year ago
Which of the following equations has an extraneous root?<br><br>​
RSB [31]

Answer:

2

Step-by-step explanation:

4 0
3 years ago
What is the property of equality for AM = AM
Andrew [12]

Answer:

Reflexive

Step-by-step explanation:

When a=a, it is called the reflexive property

a=b then b=a is the symmetric property

a=b b=c then a=c is the transitive property

7 0
2 years ago
A cafeteria manager can choose from among six side dishes for the lunch menu: applesauce, broccoli, corn, dumplings, egg rolls,
pochemuha

Answer:

20%

brainly.com/question/12746119

5 0
1 year ago
Read 2 more answers
Other questions:
  • The terminal velocity of a person falling through air is about 100Km/hr. The acceleration due to gravity is 10ms−2. Use this inf
    11·1 answer
  • Luis has $20.He buys 4 cans of tennis balls and gets $8 back as change .How much did one can of tennis balls cost?
    12·2 answers
  • Let statements p, q, r, and s be as follow:
    9·1 answer
  • How to do fraction ?
    5·2 answers
  • Alex lost 36 pounds in 8 weeks on his new weight loss plan. What was his average change in weight per week?
    12·2 answers
  • Instead of having 1.5 times as many pink flowers as white flowers, molly has decided to plant a garden with twice as many pink f
    11·2 answers
  • The sloping side of a cone is 10cm and the height is 8cm. find the radius of the base
    13·1 answer
  • Olve the system of equations.
    10·1 answer
  • EASY POINTS<br> PLEASE ANSWER<br> :)<br><br> LOTS OF POINTS!!!!!!!!!!!!!!!!!!!!!!
    7·1 answer
  • 5. Refer to the figure shown. Determine the measure of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!