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
ANEK [815]
3 years ago
13

Solve: 2x2-x = 21 {-7/2,3} {-3, 7/2}​

Mathematics
1 answer:
Sergio039 [100]3 years ago
4 0

Answer:

The answer is (-3,7/2)

Step-by-step explanation:

2 {x}^{2}  - x - 21 = 0 \\ (2x - 7)(x + 3) = 0 \\ 2x - 7 = 0 \:  \:  \: or \:  \: x + 3 = 0 \\ x =  \frac{7}{2}  \:  \: and \: x =  - 3

I am a math teacher If you need any explanation you can communicate with me on Whats on this number +201557831028

You might be interested in
help me please ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,<<<<<<<<<<<<<<<,
sergejj [24]
The answer is 3!!!! :))
5 0
3 years ago
Value walks 2 3/5 miles each day.BI'll runsure 10 miles oncell every 4 days.In 4 days, who covers the greater distance
anyanavicka [17]
The answer is the one that runs 10 miles once every 4 days
4 0
3 years ago
Read 2 more answers
Absolute value function with no x-intercepts
Kitty [74]

Answer:

y = |x| + 1

Step-by-step explanation:

1 can be anything greater than 0

5 0
1 year ago
PLEASE HELPPPP!!!!!!!
Strike441 [17]

Answer:

Subtract 4 from each side

Step-by-step explanation:

x + 4 > -8

Subtract 4 from each side

x + 4-4 > -8-4

x>-12

6 0
2 years ago
Help pls with math lotsss of points!!!
sveticcg [70]

Answer:

5x^2+22x-12         x cannot be -5, -4, -2

(x+5)(x+4)(x+2)

Step-by-step explanation:

In order to solve this, your denominator must be the same. Let's start by writing out the two different quadratic formulas:

x^2 + 6x + 8 <-- This should factor out to (x+4)(x+2)

x^2 + 7x + 10 <-- This should factor out to (x+5)(x+2)

Now that you have factored out the two quadratics, plug them into the equation.

    5x        -       3

(x+4)(x+2)      (x+5)(x+2)

Now as we know, -2 cannot be x because it will turn the entire equation undefined. Multiple top and bottom with (x+5) on the right side and (x+4) on the left side.

5x (x+5)             -           3(x+4)  

(x+5)(x+4)(x+2)      (x+5)(x+4)(x+2)

Focus on the top. 5x(x+5) will turn out to be 5x^2+25x. 3(x+4) will turn out to be 3x+12. Combine the two equations because now they are equal to each other and do the subtraction:

5x^2+25x - (3x+12)     =    5x^2+22x-12         x cannot be -5, -4, -2

 (x+5)(x+4)(x+2)               (x+5)(x+4)(x+2)

4 0
2 years ago
Other questions:
  • Select the correct location on the coordinate plane. Ruhana owns a workshop where her team of technicians refurbishes TV sets an
    5·1 answer
  • What is the y intercept of the line whose equation is y=1/x-3
    6·2 answers
  • How do you find the area of the shaded region of a circle?
    14·1 answer
  • your distance from a lighting strike varies directly with the time it takes you to hear thunder. If you hear thunder 10 seconds
    11·1 answer
  • Which statements are true?
    15·1 answer
  • The price of a cup of coffee has risen to $2.45 today. Yesterday's price was $2.30 . Find the percentage increase. Round your an
    7·1 answer
  • It takes Caroline 22 minutes to ride her bike from Sterling to Potomac Falls. It takes her 14 minutes to ride from Potomac Falls
    10·2 answers
  • HELPPPPPPPPPPPPPPPPPPPPPPPPPPPHEL
    8·1 answer
  • length of rope measures 8 3/4 km. If a piece of rope measuring 2 1/2 km was cut off, what length of rope remained? *​
    14·2 answers
  • Sara has a bag of coins. The bag contains 8 quarters, 10 dimes, 4 nickels,
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!