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
S_A_V [24]
3 years ago
10

What are the roots of the equation x^2+6x-9=0

Mathematics
1 answer:
Mila [183]3 years ago
4 0

Answer:

x = approx. 1.24 or -7.24

Step-by-step explanation:

It's hard to factor directly so we should use the quadratic formula or complete the square. I'm going to go with completing the square.

x²+6x-9=0

x²+6x=9

x²+6x is the same as x²+2·3·x, in order to make this into the algebraic identity (A+B)²=A²+2AB+B², we must add B², or in this case 3² to both sides. (A is x, B is 3)

x²+6x+9=18

(x+3)²= 18

x+3= ±√18

x= ±4.24 -3 (approximately 4.24)

First solution for  x = 4.24-3 = 1.24

Second solution for x = -4.24-3 = -7.24




You might be interested in
I need help on this question can someone please help me?
Svetllana [295]

I really hate these algebra problems pretending to be geometry.  

Anyway angles B and D  are congruent in a parallelogram.  Geometry part done.

4n - 2 = 2n + 32

2n = 34

n = 17

Answer: 17, which is the 3rd choice

3 0
3 years ago
Read 2 more answers
F(x)=−7x−1 <br> f(____)= -8
djyliett [7]
-8 = -7x-1
bring -1 to the other side as we are isolating for x so it will be
-7 = -7x then divide -7 from each side
-7/-7 = (-7/-7)x
1 = x

Answer is f(1)= -8
7 0
3 years ago
Dominic is designing a new board game, and is trying to figure out all the possible outcomes. How many different possible outcom
oksian1 [2.3K]

Answer:

If he spins a spinner with 5 equal sections they have equally likely probability of 20%

If he rolls a fair die in the shape of pyramid with 4 sides each side has probability of 25%

If he rolls a fair die in the shape of cube with 6 sides each side has probability of 16.7

Total number of outcomes = 5 * 6 * 4 = 120

7 0
2 years ago
Four students were discussing how to find the unit rate for a proportional relationship. Which method is valid? “Look at the gra
AlladinOne [14]

The correct answer is: [A]: " Look at the graph of the relationship.  Find the y-value of the point that corresponds to x = 1 . That value is the unit rate."

<h3>What is  y-value?</h3>

The vertical value in a pair of coordinates. How far up or down the point is. The Y Coordinate is always written second in an ordered pair of coordinates (x,y) such as (12,5). Also called "Ordinate".

Here, The "y-axis" is located on the "vertical axis" that represents the "dependent variable" (or, at times, the "control value") that cannot be "manipulated" / controlled/ or "selected" / since it represents the "y-value" of the corresponding coordinate to which the "x-value" happens to corresponds to at the given value for "x" .

Thus, the correct answer is: [A]: " Look at the graph of the relationship.  Find the y-value of the point that corresponds to x = 1 . That value is the unit rate."

Learn more about Y-value from:

brainly.com/question/3319387

#SPJ1

8 0
1 year ago
(-6+7) - (-4x - 2) ?
Law Incorporation [45]

the answer to your question is 7

6 0
3 years ago
Read 2 more answers
Other questions:
  • How bigger is a 1 ¼ inch button than a ⅝ inch button
    13·1 answer
  • What is the answer to 5x-1=x+15
    5·2 answers
  • The diameter of the larger circle is 10.5 cm. The diameter of the smaller circle is 4.5 cm. What is the approximate area of the
    10·1 answer
  • Thx u for helping plz answer one or all thx u very much
    15·1 answer
  • Which number is the inequality? m &gt; 7/12
    8·2 answers
  • Eli wants to combine 0.5 gallon of a 10% acid solution with some 35% acid solution to make a 15% acid solution. How much of the
    10·2 answers
  • A group of eight friends (five girls and three boys) plans to watch a movie but they have only five tickets how many different c
    11·1 answer
  • 6<br> b<br> 2<br> a<br> 6<br> same result
    12·1 answer
  • An equation is written<br><br>ac-b=1<br><br>Based on the equation, which is a true statement?​
    5·1 answer
  • Sketch a graph of the following inequality and the choose the correct description of the graph: x + y - 5 ≥ 0
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!