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
xxTIMURxx [149]
2 years ago
15

A) Write ²

Mathematics
1 answer:
I am Lyosha [343]2 years ago
5 0

Answer:

see explanation

Step-by-step explanation:

(a)

x² - 2x - 4

using the method of completing the square

add/subtract ( half the coefficient of the x- term )² to x² - 2x

= x² + 2(- 1)x + 1 - 1 - 4

= (x - 1)² - 5

with c = - 1 and d = - 5

(b)

x² - 2x - 4 = 0 ← using result from (a) , that is

(x - 1)² - 5 = 0 ( add 5 to both sides )

(x - 1)² = 5 ( take the square root of both sides )

x - 1 = ± \sqrt{5} ( add 1 to both sides )

x = 1 ± \sqrt{5}

You might be interested in
What is the volume of the regular pyramid?
ad-work [718]

Answer:

C

Step-by-step explanation:

The volume of the regular pyramid is V=\dfrac{1}{3}A_{base}H.

The base of given pyramid is regular hexagon with side 12 cm. The are of this hexagon consistsof area of 6 equilateral triangles and is equal to

A_{base}=6\cdot \dfrac{1}{2}\cdot 12\cdot 10.4=374.4\ cm^2.

Hence, the volume of the pyramid is

V=\dfrac{1}{3}\cdot 374.4\cdot 36=4,492.8\ cm^3.

7 0
3 years ago
A ribbon is 30cm long and it is cut into three pieces such that each piece is 2cm longer than the next. Represent this as an equ
Alisiya [41]

Answer:

Step-by-step explanation:

3 pieces such that each piece is 2 cm longer then the next...

x , x + 2, x + 4

x + x + 2 + x + 4 = 30

3x + 6 = 30

3x = 30 - 6

3x = 24

x = 24/3

x = 8

x + 2 = 8 + 2 = 10

x + 4 = 8 + 4 = 12

check...

8 + 10 + 12 = 30

18 + 12 = 30

30 = 30 (correct)...it checks out

the ribbon lengths are : 8 cm, 10 cm, and 12 cm

3 0
3 years ago
Read 2 more answers
What is the square root of 5
Zigmanuir [339]

Answer:

2.236

Step-by-step explanation:

you could estimate it to be between 2 and 3 (because 5 is between 4 and 9)

or you just put it into a calculator

5 0
3 years ago
Explain in 1-2 sentences how you identify
andrezito [222]

Answer:

You can tell because, as x increases/decreases, y increases/decreases at the same rate EACH TIME. This way, no matter how many times the proportions increase OR decrease, the ratio between x and y always stays the same.

8 0
3 years ago
Y = 3x + 2<br> What is x?
Aliun [14]
That question is impossible because we don’t know what we are trying to solve for it has to be x or y in this scenario it can’t be both we need one to find the other
4 0
2 years ago
Read 2 more answers
Other questions:
  • A track is 200 meters long. How many times must Julius run around the track to run 3 kilometers ?
    11·1 answer
  • Suppose a jet travels 60 kilometers in 5 minutes how many would it travel in 2? In 6 hours?
    14·1 answer
  • What is 2(2x-5)=6x+4
    10·1 answer
  • What is the best way to estimate the quotient of 7,713 divided by 18
    5·1 answer
  • (-100)  / - (-10) solve it​
    6·2 answers
  • Solve for x. please please i need help help me please
    7·1 answer
  • Which is the best estimate for the height of the candle after 1 hour?
    15·1 answer
  • Ut 28, <br> –<br> 46, and 8 in order from least to greatest.
    15·1 answer
  • What is the solution of x^2=6x-3? Use the Quadratic Formula​
    13·1 answer
  • What is less than 1/6 then 6/6 ? it will help me a lot plz
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!