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
forsale [732]
3 years ago
9

For what values of x is x2 + 2x = 24 true?

Mathematics
2 answers:
Sophie [7]3 years ago
8 0

x^2 + 2x = 24\\x^2+2x+1=25\\(x+1)^2=25\\x+1=5 \vee x+1=-5\\\x=4 \vee x=-6

Dennis_Churaev [7]3 years ago
4 0

Answer:

x = - 6, x = 4

Step-by-step explanation:

Given

x² + 2x = 24 ( subtract 24 from both sides )

x² + 2x - 24 = 0

To factorise the quadratic

Consider the factors of the constant term (- 24) which sum to give the coefficient of the x- term (+ 2)

The factors are + 6 and - 4, since

6 × - 4 = - 24 and 6 - 4 = + 2, hence

(x + 6)(x - 4) = 0

Equate each factor to zero and solve for x

x + 6 = 0 ⇒ x = - 6

x - 4 = 0 ⇒ x = 4

You might be interested in
Which will result in a perfect square trinomial (3x-5) (-3x-5)?
makvit [3.9K]

Answer:

-9x² + 25

Step-by-step explanation:

To solve, use FOIL. FOIL:

First

Outside

Inside

Last

Solve "First":

(3x)(-3x) = -9x²

Solve "Outside":

(3x)(-5) = -15x

Solve "Inside":

(-5)(-3x) = +15x

Solve "Last":

(-5)(-5) = +25

Combine like terms:

-9x² - 15x + 15x + 25

-9x² (-15x + 15x) + 25

-9x² + 25

-9x² + 25 is your answer.

~

8 0
3 years ago
What is the value of 5^3i^9
Tema [17]

Answer:

5^(3)i^(9)= five cubes times i to the power of 9=125i

Step-by-step explanation:

Raise 5 to the power of 3

rewrite i9 as (i^4)2^i

so, you get 125((i^4)^2i)

i^4=1

125(1^2i)

125i

4 0
3 years ago
Simplify each expression
Rzqust [24]

Answer:

See below

Step-by-step explanation:

1.

-6(a + 8)

Distribute the -6.

-6a - 48

2.

4(1 + 9x)

Distribute the 4.

4 + 36x or 36x + 4

3.

6(-5n + 7)

Distribute the 6.

-30n + 42

4.

(9m + 10) * 2

Rewrite.

2(9m + 10)

Distribute the 2.

18m + 20

5.

(-4 - 3n) * -8

Rewrite.

-8(-4 - 3n)

Distribute the -8.

32 + 24n or 24n + 32

6.

8(-b - 4)

Distribute the 8.

-8b - 32

7.

(1 - 7n) * 5

Rewrite.

5(1 - 7n)

Distribute the 5.

5 - 35n or -35n + 5

8.

-6(x + 4)

Distribute the -6.

-6x - 24

9.

5(3m - 6)

Distribute the 5.

15m - 30

10.

(-6p + 7) * -4

Rewrite.

-4(-6p + 7)

Distribute the -4.

24p - 28

11.

5(b - 1)

Distribute the 5.

5b - 5

12.

(x + 9) * 5

Rewrite.

5(x + 9)

Distribute the 5.

5x + 45

5 0
3 years ago
Math<br> Hhfgggvcvbvvvngdb do. CNBC h Vic. Gndjydhfsjtfxb
Elodia [21]
KANDNSNFNWNDNWNE math.
8 0
3 years ago
What is 2/3 times 1/4
barxatty [35]
(2/3)(1/4)=
2/12=
1/6
multiply the numerators by the numerators, (top numbers)
and the denominators by the denominators, (bottom numbers)
6 0
3 years ago
Other questions:
  • Given a circle in the complex plane with a diameter that has endpoints at: -12 − i and 18 + 15i Find the center of the circle. +
    8·2 answers
  • A recipe uses 3 eggs for every 8 cups of flour. What is the ratio of eggs to flour in the recipe?
    14·2 answers
  • Solve the equation.<br><br> –9x + 1 = –x + 17
    5·1 answer
  • According to Greg, perfect cherry pies have a ratio of 240 cherries to 3 pies.
    8·2 answers
  • The population of fruit flies tripled every day and the population today is 200 fruit flies.
    5·1 answer
  • Twenty years from now, you want to spend $175,000 for a fancy car. How much must you deposit as a lump sum today to achieve this
    8·1 answer
  • Which should equal 105° to prove that f // g?<br> a<br> b<br> С<br> d
    13·1 answer
  • Alice used 240 chocolates chips in her cookies. She made 12 cookies. How many chocolate chips were in each cookies.
    8·1 answer
  • PLEASE HELP
    14·1 answer
  • Fast please!! I need it
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!