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julsineya [31]
3 years ago
14

How do I find the solutions to 8x^3-x+7

Mathematics
1 answer:
Alika [10]3 years ago
8 0

Answer:

x = -1

Step-by-step explanation:

You can use rational root test to check for rational roots.

Factors of 8: 1, 2, 4, 8

Factors of 7: 1, 7

Possible rational roots: ±1/1, ±1/2, ±1/4, ±1/8, ±7/1, ±7/2, ±7/4, ±7/8

Checking, we find that -1 is a root.  Knowing that, we can use grouping to factor:

8x³ − x + 7

8x³ + 8x² − 8x² − x + 7

8x² (x + 1) − (8x² + x − 7)

8x² (x + 1) − (8x − 7) (x + 1)

(8x² − (8x − 7)) (x + 1)

(8x² − 8x + 7) (x + 1)

Using the quadratic formula, we find that 8x² − 8x + 7 has no real solutions.

Therefore, the only solution is x = -1.

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Can anybody teach me how to solve this pls​
wel
Answer is 10 and 170, complementary angles are 90°, while supplementary angles are 180 in total, if angle A is 80 then you subtract 90 by 80 and you get 10, so that is angle B, So then you are asked what is angle C. Which is part of the supplementary angle so you take the 10° that you got from B and then you subtract 180 by the 10, And thats how you get 170 and that's how you know that C is 170 (hope this explanation helps)
3 0
3 years ago
1+4(6p-9) simplified
snow_lady [41]

Answer

24p+ (-31)

Step-by-step explanation:

  1. P.EM.D.A.S
  2. 4*6p=24p
  3. 4*-9=-36
  4. now it looks like: 1+4+24p+-36
  5. now for addition 1+4+24p+-36= 24p+ (-31)
5 0
4 years ago
A function is shown: f(x) = 36x² - 1.
givi [52]

Based on the given function, the equivalent function that best shows the x-intercepts on the graph is f(x) = (6x - 1)(6x + 1)

<h3>What are equivalent functions?</h3>

Equivalent functions are different functions that have equal values when evaluated and compared

<h3>How to determin the equivalent function that best shows the x-intercepts on the graph?</h3>

The function is given as:

f(x) = 36x^2 - 1

Express 1 as 1^2

f(x) = 36x^2 - 1^2

Express 36x^2 as (6x)^2

f(x) = (6x)^2 - 1^2

Apply the difference of two squares.

This is represented as:

(a + b)(a - b) = a^2 - b^2

So, we have the following equation

f(x) = (6x - 1)(6x + 1)

Based on the given function, the equivalent function that best shows the x-intercepts on the graph is f(x) = (6x - 1)(6x + 1)

Read more about equivalent function at:

brainly.com/question/2972832

#SPJ1

8 0
2 years ago
2(x + 5) = 3x + 13y – 4= 6 – 2y3(n + 2) = 9(6 – n)
dezoksy [38]
42 I think I’m not really sure
6 0
3 years ago
Will mark BRAINLIEST if you help me out with this math! thank you! help asap! ​
devlian [24]

Answer:

1/4 for both

Step-by-step explanation:

4 0
3 years ago
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