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
Rasek [7]
3 years ago
15

Solve the following equation algebraically: x^2=20

Mathematics
2 answers:
amid [387]3 years ago
8 0

Answer:

Step-by-step explanation:

x² = 20

x² - 20 = 0

x² -  (√20)² =0

by identity : a² - b² =  ( a - b )( a + b) in this exercice : a = x and b =√20

( x - √20)(x + √20) = 0

x - √20 = 0  or  x + √20 = 0

x = √20 or x =  - √20

but : 20 = 4×5

20 = √(4×5) =√4×√5 = 2√5

Zielflug [23.3K]3 years ago
6 0

Answer:

x = ± 2\sqrt{5}

Step-by-step explanation:

Given

x² = 20 ( take the square root of both sides )

x = ± \sqrt{20} = ± \sqrt{4(5)} = ± 2\sqrt{5}

You might be interested in
1 5.2.3 Quiz: Completing the Square
Softa [21]

Answer:

x=5/2 or x=2.5

Step-by-step explanation:

x time 2 + 4x=15

6x=15

2x=15

2x=5

7 0
2 years ago
Help me come up with a YT name plz. I’m looking for something that POPS, but I keep coming up with the same names/words.
likoan [24]
ACEMaster52 u like that I made it up
8 0
3 years ago
2/5 - 3/5 ? Subtracting fractions <br>​
Drupady [299]

-1/5Answer:

Step-by-step explanation:

6 0
3 years ago
ANSWER PLEASE
frosja888 [35]

Divide salary by hours:

120,000 / 1450 = $82.76

7 0
3 years ago
The Slope of whats graphed
Bumek [7]

Answer:

Slope: 1/3

Step-by-step explanation:

y = 1/3 x - 2

8 0
3 years ago
Other questions:
  • 24 students and Jamal's class are wearing tennis shoes there are 30 students in this class your mom says that 70% of this class
    13·1 answer
  • Devon is paving a rectangular driveway. The driveway is 25.3 meters long and 18.4 meters wide. The formula for the area of a rec
    11·1 answer
  • Support requests arrive at a software company at the rate of 1 every 30 minutes. Assume that the requests arrive as events in a
    15·1 answer
  • Assume y varies directly as x. If y = 30 when x = -3, find y when x = -9.
    12·1 answer
  • Sacar arista a un rectangunlo , cuadro y triangulo
    7·1 answer
  • What is the absolute value of 8.15
    15·1 answer
  • A study analyzed the average yearly salt intake in the United States from 2012 thru 2017. The data is summarized in the table:
    8·1 answer
  • George is going to sing 4 songs in
    13·2 answers
  • PLEASEEEE HELP MEEE
    7·1 answer
  • 36 first-graders and 14 other students attended a school assembly. What percentage of the students at the assembly were first-gr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!