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
tresset_1 [31]
2 years ago
11

Solve the quadratic equation 3x²-3x-1=0?(by using the square method)​

Mathematics
1 answer:
ohaa [14]2 years ago
8 0

Answer:

x=1 and x=-1/3

Step-by-step explanation:

3x^2-2x-1=0\\\\3(x^2-\frac{2}{3}x-\frac{1}{3})=0\\ \\3(x^2-\frac{2}{3}x-\frac{1}{3}+\frac{4}{9})=3(\frac{4}{9})\\ \\ 3(x^2-\frac{2}{3}x+\frac{1}{9})=\frac{4}{3}\\ \\ 3(x-\frac{1}{3})^2=\frac{4}{3}\\ \\(x-\frac{1}{3})^2=\frac{4}{9}\\ \\x-\frac{1}{3}=\pm\frac{2}{3}

x-\frac{1}{3}=\frac{2}{3}\\ \\x=\frac{3}{3}\\ \\x=1

x-\frac{1}{3}=-\frac{2}{3}\\ \\x=-\frac{1}{3}

Therefore, x=1 and x=-1/3

You might be interested in
How many seconds are in 14 years?
Airida [17]
4.415e+8 

Have a wonderful day
8 0
3 years ago
Read 2 more answers
How many yards are in 42 feet
ziro4ka [17]
First you need to find how many yards is in 1 feet , so is equal = 3feet , Now you need to find one number that is multiply by 3 that is equal to 42 so that is : 14 .. I hope that this can help you :)
4 0
3 years ago
A survey of 100 people found that 35 people exercise in the morning, 45 people exercise in the afternoon, and 20 people exercise
Sophie [7]
Jim is correct because the ratios need to compare with the total amount of people surveyed. 55, 80, and 65 are numbers that don't fit in and don't tell the overall ratio. You can tell this by writing it as a fraction. 
Ex: 35:100 = 35/100. This literally means 35 out of 100 people exercise in the morning. 

Hope this helps! If you have any questions, just ask!
4 0
3 years ago
Read 2 more answers
calvin and susie baked some cookies in the ratio of 3 : 7. calvin baked 60 fewer cookies than susie. how many cookies did they b
kow [346]

Answer:

Step-by-step explanation:

Ratio of cakes baked by Calvin and Susie = 3 : 7

Cakes baked by Calvin = 3x

Cakes baked by Susie = 7x

Cakes baked by Calvin = Cakes baked by Susie - 60

3x = 7x - 60

7x - 60 = 3x

7x        = 3x  + 60

7x - 3x = 60

      4x  = 60

        x = 60/4

x = 15

Cakes baked by Calvin = 3*15 = 45

Cakes baked by Susie = 7 *15 = 105

Total cakes baked = 45 + 105 = 150

They both baked 150 cakes altogether.

8 0
2 years ago
The ratio of sugar to flour used in a pudding recipe is 2:1. Which figure shows equivalent ratios? A graph is drawn. The title i
Galina-37 [17]

Answer:

idek

Step-by-step explanation:

fr

5 0
2 years ago
Read 2 more answers
Other questions:
  • Find the inverse of the function y = x2 - 12.
    12·1 answer
  • Find the value of x and explain please <br> ANSWER ASAP!!!!!!!!!!!!!!!!!
    10·1 answer
  • Which functions are symmetric with respect to the origin?
    10·1 answer
  • Write 5×5×5×5×4×4×4 in exponential form
    13·1 answer
  • I need help with this!
    8·1 answer
  • Which value is the solution of the equation 8.25r = 554.4?
    8·2 answers
  • Which function is increasing?
    5·1 answer
  • Triangle XYZ has points X = (–4,4), Y = (0,1), and Z = (4,4). Triangle X'Y'Z' has points X ’= (–5,–4), Y’ = (–1,–1), Z’ = (3,–4)
    15·1 answer
  • Solve and check the equation.<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B10%7D%3D%5Cfrac%7B5x%7D%7B7%7D%20-43" id="TexFor
    9·1 answer
  • 6. Jasper pays $42.8 for his cell phone. Marco pays $38.15 for his cell phone plan.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!