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
Lerok [7]
4 years ago
14

What are the real roots of 2x^3+9x^2+4x-15=0

Mathematics
1 answer:
klemol [59]4 years ago
8 0
Well, luckily it is apparent that (x-1) is a root because when x=1 the equation is equal to zero.  So we can divide the equation by that factor to find the other roots. 

(2x^3+9x^2+4x-15)/(x-1)
2x^2  r  11x^2+4x-15
11x    r  15x-15
15     r   0

(x-1)(2x^2+11x+15)=0

(x-1)(2x^2+6x+5x+15)=0

(x-1)(2x(x+3)+5(x+3))=0

(x-1)(2x+5)(x+3)=0

So the roots are x= -3, -2.5, 1
You might be interested in
Which graphs show continuous data?<br><br> Select each correct answer.
love history [14]
C

Due to the fact that it is starting from 0 and moving in a steady pattern
5 0
3 years ago
Read 2 more answers
Work out the area of a triangle of base 8.2m and height 5m
11Alexandr11 [23.1K]
Area of a triangle is calculated by using the formula A=1/2bh
A= 1/2 (8.2) (5)
A=1/2 (41)
A=20.5 or 20 1/2, whichever way you think your teacher wants it.
5 0
3 years ago
Read 2 more answers
4 x 12 = 6 x n.<br><br> 4<br> 6<br> 8<br> 12
Natali5045456 [20]

Answer:

The answer is 8

Step-by-step explanation:

Because 4x12 is 48 and so is 6x8

8 0
3 years ago
Read 2 more answers
a person standing at a ridge in the grand canyon throws a penny upeard and toward the pit of the canyon. The height of the penny
Lelechka [254]
I believe its 80 if you derive it out, but there is no units of measurement.
4 0
3 years ago
the home teams score exceeded 2 times the hosting teams score by 5 if the visiting teams score is x which expression represents
babunello [35]

Answer:

2x+5

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Find the value of x and y that maximize or minimize the objective function.
    13·1 answer
  • What is the sum of (1.3 × 10-7) and (-3.8 × 10-3)?
    10·1 answer
  • Deon is riding his bicycle. He rides for 7 hours at a speed of 22.4 kilometers per hour. For how many kilometers does he ride
    12·1 answer
  • Anyone know this? thank you
    12·1 answer
  • X = -12 is a vertical line.
    15·1 answer
  • Pat earns $489 per week at her new job. Calculate her annual salary. (Do not enter $ or comma in your answer.)​
    14·1 answer
  • Given the graph below, which of the following points would be included in the graph of the inverse of the function?
    8·2 answers
  • How can you tell the difference between a strong linear association and a weak linear association?
    10·1 answer
  • What is the growth or slope of the simplified equation? NEED ANSWER ASAP
    9·1 answer
  • Which of the following sequences of transformations is used to obtain figure A prime B prime C prime D prime from figure ABCD? (
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!