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
marshall27 [118]
3 years ago
8

Solve for x in the equation x^2 + 4x - 4 = 8

Mathematics
2 answers:
olga nikolaevna [1]3 years ago
5 0

x^2+4x-4=8

Subtract 8 from both sides: x^2+4x-4-8=8-8

Simplify: x^2+4x-12=0

Solve with the quadratic formula: For a=1,b=4,c=-12: x1,2= -4+- (4^2-4*1(-12))sqrt over 2*1

x= 2 and x=-6

erik [133]3 years ago
3 0

Subtracting 8 from both sides of the equation gives

x^2 + 4x - 12 = 0

(x + 6)(x - 2)= 0

x = -6, 2   answer

You might be interested in
a particular species of bamboo can grow up to 91 centimeters in a day. how fast is this in inches per hour
solniwko [45]
I would probably just do 91 times 60 since 60 min is 1 hour
8 0
2 years ago
The smiths have two children. The sum of their ages is 23. The produce of their ages is 132. How old are the children?
kolezko [41]

For this case we propose a system of equations:

x: Let the variable representing the age of the first child of the Smiths

y: Let the variable representing the age of the second child of the Smiths

According to the data of the statement we have to:

x + y = 23\\x * y = 132

From the first equation we have to:

x = 23-y

We substitute in the second equation:

(23-y) * y = 132\\23y-y ^ 2 = 132\\y ^ 2-23y + 132 = 0

We find the solutions by factoring:

We look for two numbers that, when multiplied, result in 132 and when added, result in 23. These numbers are 11 and 12.

Thus, we have that the factorized equation is:

(y-11) (y-12) = 0

Thus, the solutions are:y_ {1} = 11\\y_ {2} = 12

So, we can take any of the solutions:

With y = 11

Thenx = 23-11 = 12

Therefore, the ages of the children are 11 and 12 respectively.

Answer:

 The ages of the children are 11 and 12 respectively.

6 0
3 years ago
PLEASE HELP NEED ASAP
babymother [125]
What the formula?
::::::::::::::::::::::::::::::1
7 0
3 years ago
Can someone help me? it’s due in like 10 minutes
Romashka-Z-Leto [24]

Answer:

B. 3x + y = 4

Step-by-step explanation:

y = -3x + 4

Check:

3x + y = 4

<u>-3x        -3x</u>

y = -3x + 4

8 0
3 years ago
Read 2 more answers
Help me out please :)
Alisiya [41]

Answer:

2$ I think

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • a retangular pool is filled with 18.75 cubic meters of water. If the pool is 5 meters long and 2.5 meters wide, what is the dept
    15·2 answers
  • A<br> 1<br> 3<br> -2<br> -1<br> 0<br> B<br> -1<br> The midpoint of AB = ([?], [ ])
    12·1 answer
  • In a bottle there are 370 liters of water. There are 46 small
    14·1 answer
  • A floor tile is 20 inches wide. If the perimeter of the tile is 72 inches, what is the length of the tile?
    12·1 answer
  • Can someone plz help me I bed u
    10·1 answer
  • Find n(a) for the set
    8·1 answer
  • С
    13·1 answer
  • I need help and I can’t find any sadly. Help!!
    10·1 answer
  • Points S and T are midpoints of the sides of triangle FGH.
    11·1 answer
  • Solve |2x + 2| = 10
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!