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
Elena L [17]
3 years ago
8

The equation x2 − 9 = 0 has real solution(s).

Mathematics
2 answers:
tatiyna3 years ago
6 0

Answer:

The roots are real and unequal (3, -3)

Step-by-step explanation:

x²-9=0

ax²+bx+c=0

Comparing we get,

a= 1

b= 0

c = -9

Determinant: b²-4ac

= 0² - 4(1)(-9)

= 36>0

D > 0

Therefore, the equation has real and unequal roots.

Algebraic identity:

x² - a² = (x-a)(x+a)

Using this identity

x²-9 = (x+3)(x-3)

Roots are 3 and -3 which are real and not equal to each other

Hope this answer helps you ..

sweet-ann [11.9K]3 years ago
3 0

Answer:

2 real solutions

You might be interested in
10% of the time Spencer runs in pre-athletics he comes in first place. If he runs 30 times, how many times is he in first place?
Stels [109]

Answer: He win 3 out of the 30

Step-by-step explanation:

30 divided by 10 = 3 which is 10 percent of  30 :)

3 0
3 years ago
In 1980, the number of African elephants was 1,200,000 but that number was decreasing 5.25% a year.
algol13
<span>Answer is about 12.85.</span>
3 0
3 years ago
Please Help!!!!!!! Meryl spends a total of $68.82 for 2 pairs of sneakers
timama [110]
2x+3-5.32=68.82

2x= 71.14

x=35.57

each sneaker costs $35.57
3 0
3 years ago
Read 2 more answers
Please help!!!!!!!!!!
topjm [15]
Ah yes, good ol’ Pythagorean’s theorem.

The hypotenuse is the opposite of the 90 degree angle, the longest side of the triangle.

The legs are opposite of the acute angles

Formula: a^2 + b^2 = c^2

2:

Let’s plug in some values

(6)^2 + (3)^2 = c^2

C = 6.7

The side will be 6.7 units

3)

Let’s plug in some values

(13.3)^2 = (9.7)^2 + (b)^2

(13.3)^2 - (9.7)^2 = b^2

176.89 - 94.09 = b^2

b = 9.1

The side will be 9.1 units
3 0
2 years ago
Compare the fractions 3/5<br> and 2/3<br> which is larger?<br> Show your work
rusak2 [61]

Answer:

2/3 is larger

Step-by-step explanation:

3/5 x 3/3 = 9/15

2/3 x 5/5 = 10/15

7 0
3 years ago
Read 2 more answers
Other questions:
  • You have 88 love hearts and decide to share them with your friend . For every 5 love hearts you keep ,you give 3 to your friend
    13·1 answer
  • Im in geometry and i legit have no idea how to do this help please lol
    5·1 answer
  • When estimating the number of spheres contained in a prism we should account for the empty space between the spheres. To do this
    11·1 answer
  • Choose the correct answer below.
    8·1 answer
  • How to Solve 3y-2&gt;5
    8·1 answer
  • Three red and three blue flags are arranged randomly along
    6·2 answers
  • After extensive measurements of the time necessary to complete the first homework assignment, a teacher determines that there is
    9·1 answer
  • A baseball player got 102 hits in the last 300 times at bat. Explain how you would find the percent of times at bat.​
    9·2 answers
  • Eh ok how do i do this lol
    11·2 answers
  • Can yall please help me
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!