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
Semenov [28]
2 years ago
8

Solve for x in the equation x2 + 4x-4=8.

Mathematics
1 answer:
iren [92.7K]2 years ago
7 0

{x}^{2}  + 4x - 4 = 8 \\  =  >  {x}^{2}  + 4x - 4 - 8 = 0 \\  =  >  {x}^{2}  + 4x - 12 = 0 \\  =  >  {x}^{2}  + 6x  - 2x - 12 = 0 \\  =  >  x(x + 6) - 2(x + 6) = 0 \\  =  > (x - 2)(x + 6) = 0 \\  =  > x = 2 \:  \:  \: or \:  \:  \: x =  - 6

<u>Answer</u><u>:</u>

x = -6 or x = 2

Hope you could get an idea from here.

Doubt clarification - use comment section.

You might be interested in
64.3 - 3 x 2 by the power of 3 divided by two
kolbaska11 [484]
If you meant:

64.3-3*(2³)/2

That would be 52.3 :)
8 0
3 years ago
Read 2 more answers
Jafar will get $12400 more if his salary is increased by 31%. Jafar's salary is 20% less of his colleague Ali's salary. What is
Iteru [2.4K]

Answer:

Ali's salary is $50000.

Step-by-step explanation:

Let Jafar's salary be x.

(31/100)*x = 12400

x = (12400*100)/31

x = 400*100

x = $40000

Let Ali's salary be y.

y-[(20/100)*y] = 40000

y-(y/5) = 40000

(5y-y)/5 = 40000

4y = 200000

y = $50000

7 0
3 years ago
A rectangle has a length of 2x+3 and a width of 10x-4. Find the perimeter and area of the figure
inn [45]

Step-by-step explanation:

perimeter is 4x+6 +20x-8=20x-2

area is 20x^2+22x-12

4 0
3 years ago
Urgent help ! similar figures use the similarity relationship to find the indicated value
masya89 [10]

Answer:

FE = 28 and YZ = 28

Step-by-step explanation:

In similar triangles the ratios of corresponding sides are equal.

(4)

\frac{BC}{FG} = \frac{BD}{FE} , substitute values

\frac{39}{4x+2} = \frac{42}{5x-2} ( cross- multiply )

39(5x - 2) = 42(4x + 2) ← distribute parenthesis on both sides

195x - 78 = 168x + 84 ( subtract 168x from both sides )

27x - 78 = 84 ( add 78 to both sides )

27x = 162 ( divide both sides by 27 )

x = 6

Thus

FE = 5x - 2 = 5(6) - 2 = 30 - 2 = 28

(5)

\frac{ST}{SZ} = \frac{RT}{YZ} , substitute values

\frac{40}{35} = \frac{3x-7}{2x+2} ( cross- multiply )

35(3x - 7) = 40(2x + 2) ← distribute parenthesis on both sides

105x - 245 = 80x + 80 ( subtract 80x from both sides )

25x - 245 = 80 ( add 245 to both sides )

25x = 325 ( divide both sides by 25 )

x = 13

Thus

YZ = 2x + 2 = 2(13) + 2 = 26 + 2 = 28

5 0
3 years ago
Find the quotient 4/5,389
Olegator [25]

Answer:

7.42 x 10^-4

0.000742

Step-by-step explanation:

0.

5389 | 4

0.0

5389 | 40

0.00

5389 | 400

0.000

5489 | 4000

0.0007

5489 | 40000

5489 | 2277

0.00074

5489 | 22770

5489 | 814

0.00074 so on

5 0
2 years ago
Read 2 more answers
Other questions:
  • (6^2*2^3*6^4)/(12^3)<br><br>Simplified in exponential notation.
    15·1 answer
  • Raj opens his bank account with $500. He deposits $40 each month. A) write a function that shows the amount in Raj's account aft
    7·1 answer
  • What is the value of x in the equation?
    7·2 answers
  • F(x)=-2x+1; {-2,0,2,4,6} Find the range of the function for the given domain.
    5·1 answer
  • Notebooks cost $1.20 each this weekend they will be on sale for $.80 what percentage is the sale
    13·2 answers
  • I no I have to multiply all three numbers but it’s hard to multiply them
    14·2 answers
  • Choose 3 values that would make this inequality true 28 + x &gt; 42
    10·2 answers
  • How many 1/2 hours are in 1 hour
    6·1 answer
  • Please help! Reporting all irrelevant answers.. Thank you.
    15·1 answer
  • The expression (8+8+8+8+8)−(6+6+6+6+6) is equal to 10 .
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!