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
lawyer [7]
4 years ago
14

What are the solutions of the equation x6 – 9x3 + 8 = 0? Use u substitution to solve.

Mathematics
1 answer:
Lera25 [3.4K]4 years ago
6 0
X6 – 9x3 + 8 = 0
let u = x^3
u^2 - 9u + 8 = 0 
(u-8)(u-1) = 0
u = 1,8
back substitute 
1 = x^3
8 = x^3

<span>x = 1 , 2</span>
You might be interested in
What is the area of a square with a side lenght of 3/8 inches?
allochka39001 [22]

Answer:0.140625

Step-by-step explanation:

Area of square =length times width

3/8 * 3/8=0.140625

6 0
3 years ago
Read 2 more answers
Simplify each expression. Use a slash () to show a fraction. Do not use any spaces.<br> -(3)^2
I am Lyosha [343]

Answer:

The answer would be -9

Step-by-step explanation:

-(3)^2

-(9)

-9

Following order of operations (PEMDAS)

6 0
3 years ago
Suppose you invest $1,600 at an annual interest rate of 4.6% compounded continuously how much will you have in the account after
DanielleElmas [232]
Total = Principal * e^(rate*years)
where "e" is the mathematical constant 2.71828182828459
Total = 1,600 * e(.046*4)
Total = 1,600 * 2.71828182828459^(.184)
Total = 1,600 * <span> <span> <span> 1.2020158231 </span> </span> </span>
Total = <span> <span> <span> 1,923.23</span></span> </span>

Source:
http://www.1728.org/rate2.htm





8 0
3 years ago
Name the shortest segment from Point A to Line CD. Write and Solve an inequality for X.
Misha Larkins [42]
Attached the solution with work shown.

5 0
3 years ago
Which expression is NOT equivalent to the other three? A) −9 − 7n + 16n B) 9(n − 9) Eliminate C) n − 9 + 8n D) 9n − 9
yuradex [85]

Answer:

The expression is not equivalent to other three is 9(n-9) .

Option (B) is correct .

Step-by-step explanation:

Take first expression

= -9 -7n + 16n

= 9n-9

Take second expression

= 9(n-9)

= 9 × n - 9 × 9

= 9n - 81

Take third expression

= n-9+8n

= 9n-9

Take fourth expression

= 9n-9

Therefore expression is not equivalent to other three is 9(n-9) .

Option (B) is correct .

6 0
3 years ago
Read 2 more answers
Other questions:
  • Name the following polynomial: 7n3 + 10n4 + 3n
    5·1 answer
  • Mr.Chang had 30 boxes each box has 10 erasers If he gave each student has 2 erasers how many students could he give erasers to
    13·1 answer
  • Simplify the radical √-20
    8·2 answers
  • Ms yangs car needs to be repaired.The cost of the repair is going to be $40 per hour of work and an additional $120 for parts. M
    11·1 answer
  • The sum of two numbers is 21,and their difference is 9
    8·2 answers
  • The graphed system represents the rate at which two trucks are being filled, where x represents the time in minutes and y repres
    7·1 answer
  • 4. What is the range of the relation below?<br> A. -1 C.-1 Sy&lt;4<br> D.-35ys2<br> B.-3Sxs2
    8·2 answers
  • Hey could someone please help me understand the question. Ill give brainliest.
    7·2 answers
  • -3(2x-3)= -5x+5 show your work
    11·2 answers
  • 7th-grade math help me, please :(
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!