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
iogann1982 [59]
3 years ago
10

Some of the steps in the derivation of the quadratic formula are shown.

Mathematics
2 answers:
Leokris [45]3 years ago
8 0

Answer:

(C)The square root of terms separated by addition and subtraction cannot be calculated individually.

Step-by-step explanation:

In Step 7:

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

The expression \pm\sqrt{b^2-4ac} cannot be written as b \pm\sqrt{4ac}. This is as a result of the fact that square roots of terms separated by addition and subtraction cannot be calculated individually.

Take these examples:

\sqrt{9-4} =\sqrt{5} \\\sqrt{9}-\sqrt{4}=3-2=1\\ $Clearly \sqrt{5}\neq 1\\$Similarly\\\sqrt{9+4} =\sqrt{13} \\\sqrt{9}+\sqrt{4}=3+2=5\\ $Clearly \sqrt{13}\neq 5\\

eduard3 years ago
4 0

Answer:

C

Step-by-step explanation:

Took the test on edge.

You might be interested in
Solve this equation. 4h + 6 =30
Vitek1552 [10]
First you subtract 6 from both sides to get:
      4h=24
Then divide by 4:
      h=6
With these problems, use the steps of either
PEDMAS, or <em></em>Please Excuse My Dear Aunt Sally.

the P stands for Parenthesis, the E for exponents, the M for multiplication, the D for division, the A for addition, and the S for subtraction


6 0
3 years ago
Read 2 more answers
Nicole has nine dollars to spend on cards she finds friends with the same amount of money to split the cost of a set once it cos
anyanavicka [17]

Answer:

Each Friend will get \frac{x}{3} cards.

Step-by-step explanation:

Let the number of cards be x.

Given:

Amount Nicole used to spend on cards = $9

Total cost of one set =$27

Also, she finds friends with the same amount of money to split the cost of a set.

So, Number of friends she finds can be calculated by dividing the Cost of 1 set  with amount of money Nichole used to spend on cards.

Number of friends she finds = \frac{27}{9} = 3

Hence she finds 2 friends and 1 is nichole hence there are 3 persons carrying $9 to buy $27 set of card

Now, Number of cards each friend gets is equal to Total number of Cards in 1 set divided by number of people.

Number of cards each friend = \frac{x}{3}

Hence Each Friend will get \frac{x}{3} cards.

4 0
3 years ago
1(x-2)= -5.5 solving for x. What's the answer
Lapatulllka [165]

Answer:

x = -3.5

Step-by-step explanation:

1(x-2) = -5.5

x-2 = -5.5

 +2    +2

x = -3.5

3 0
3 years ago
As she drove down the icy Road Miss Campbell slammed on her breaks her car did a 360 explain what happened to her car ​
meriva

Answer:

The friction that the car usually uses to stop(a rough and hard ground) was null and void, so the car spun uncontrollably.

3 0
3 years ago
HELP MEEE!!! PLEASE!!!
lakkis [162]
Easy multiply the first number and do keep change flip 
3 0
3 years ago
Read 2 more answers
Other questions:
  • A tree is
    10·2 answers
  • Find the amount paid for the loan.<br> $4800 at 9.9% for 4 years
    15·1 answer
  • ΔABC is an isosceles triangle with AB = BC = 6 units, D and E are the midpoints of AB and BC respectively.The length of AC is 8
    7·1 answer
  • 2ft 3in= _in what is the answer
    11·2 answers
  • Finn is wrapping a package that measures 12 long ,6 wide and 3 tall. He wants to know the least amount of wrapping paper that he
    5·1 answer
  • Add the two expressions. 2n−3 and −7n+2
    15·2 answers
  • According to the Venn Diagram below and given that P(A) = .4 as well as
    9·1 answer
  • ∞ IS IT AN EVEN or odd
    5·1 answer
  • Help me do this work
    11·1 answer
  • Katie buys a large pizza for $14.99 and bottles of soda for $1.50 each. If the total cost was $23.99, how many bottles of soda (
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!