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
Alekssandra [29.7K]
3 years ago
9

Solve by completing the square3x2 + x - 2 = 0​

Mathematics
1 answer:
DIA [1.3K]3 years ago
3 0

Answer:

x = 2/3 or x = -1

Step-by-step explanation by completing the square:

Solve for x:

3 x^2 + x - 2 = 0

Divide both sides by 3:

x^2 + x/3 - 2/3 = 0

Add 2/3 to both sides:

x^2 + x/3 = 2/3

Add 1/36 to both sides:

x^2 + x/3 + 1/36 = 25/36

Write the left hand side as a square:

(x + 1/6)^2 = 25/36

Take the square root of both sides:

x + 1/6 = 5/6 or x + 1/6 = -5/6

Subtract 1/6 from both sides:

x = 2/3 or x + 1/6 = -5/6

Subtract 1/6 from both sides:

Answer:  x = 2/3 or x = -1

You might be interested in
What is the equation of the line that passes through point P (6, -8) and has a slope of zero?
EleoNora [17]

Answer:

A

Step-by-step explanation:

because it is a straight line locate at x = 6 that pass to every y coordinate, so it pass -8 too.

8 0
2 years ago
Solve 4\5x-4\10=2\20
Soloha48 [4]
4/5x - 4/10 = 2/20...multiply everything by common denominator 20
16x - 8 = 2
16x = 2 + 8
16x = 10
x = 10/16 which reduces to 5/8 <=
5 0
3 years ago
24 inches is 250% of what length
Alinara [238K]
The answer is:  " 9.6 inches " .
________________________________________________________
Explanation:
________________________________________________________

24 = 250/100 * x  ;

24 = 2.5 x ; 

↔  2.5 x = 24 ; 

2.5 x / 2.5 = 24/ 2.5 ; 

x = 9.6 ; 

The answer is:  " 9.6 inches <span>" .
</span>_________________________________________________________

4 0
3 years ago
Read 2 more answers
Does anyone know this? Needed ASAP
anzhelika [568]

Answer:

50 square units

Step-by-step explanation:

Using the formula provided, a = \frac{1}{2}h(b_1+b_2), substituting the height (5), b1 (8) and b2 (12), we can solve for the formula.

a = \frac{1}{2}\cdot5(8+12)\\\\a = \frac{1}{2}\cdot5(20)\\\\a = \frac{1}{2}100\\\\a = 50

Hope this helped!

4 0
2 years ago
Read 2 more answers
A set of numbers is shown below:
eimsori [14]

Answer:

<em><u>[</u></em><em><u>2</u></em><em><u>,</u></em><em><u>4</u></em><em><u>,</u></em><em><u>6</u></em><em><u>]</u></em>

Step-by-step explanation:

GIVEN EQUATION : 2X+3≥7

i.e, 2x≥7-3

i.e, 2x≥4

i.e, x≥4/2

i.e, x≥2

it's represent number should be greater than or equal to 2

The only number which follows the inequality from the set is 2,4&6

✌️:)

8 0
3 years ago
Other questions:
  • In 1996 the population of Capital City was 7,255,731 and the population of Sprung City was
    15·2 answers
  • What is y-2=-2(x-3) In slope intercept form
    7·1 answer
  • Find the indefinite integral. (use c for the constant of integration.) sin xcos5 x dx
    9·1 answer
  • Select the correct answer.
    6·1 answer
  • a 18,000 - gallon pool is being filled at a rate of 20 gallons per minute. At this rate ,how many minutes will it take to fill t
    7·1 answer
  • 12 points :) can y’all help me シ
    5·1 answer
  • Directions: find the measure of each missing numbered angle for each diagram below.
    13·1 answer
  • Please answer the question from the attachment.
    13·1 answer
  • Which inequality is true? Use the number line to help.
    15·1 answer
  • The table shows the total number of customers at a car wash after 1, 2, 3, and 4 days of its grand opening. which graph represen
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!