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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.

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How many 3/4 -centimeter cubes do you need to create a cube with an edge length of 12 centimeters?
zzz [600]
To make a LINE that is 12 cm long, you'd need (12 / .75) cubes or sixteen cubes.
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3 0
3 years ago
2x - 5y=-15<br> can someone walk me through this?
HACTEHA [7]
The equation given in the question has two unknown variables in the form of "x" and "y". The exact value of "x" and "y" cannot be determined as two equations are needed to get to the exact values of "x" and "y". This equation can definitely be used to show the way for determining the values of "x" in terms of "y"and the value of "y" in terms of "x". Now let us check the equation given.
2x - 5y = - 15
2x = 5y - 15
2x = 5(y - 3)
x = [5(y - 3)]/2
Similarly the way the value of y can be determined in terms of "x" can also be shown.
2x - 5y = - 15
-5y = - 2x - 15
-5y = -(2x + 15)
5y = 2x + 15
y = (2x +15)/5
   = (2x/5) + (15/5)
   = (2x/5) + 3
So the final value of x is [5(y -3)]/2 and the value of y is (2x/5) + 3.
3 0
3 years ago
Which is best estimate of the circumference of this circle when radius is 3
nydimaria [60]

Answer:

D/About 18.85

Step-by-step explanation:

So, Using the Circle Circumfrince Formula:

A=2\pi r\\A=6\pi \\A=18.85....

There you go!

Hope this helps!

P.S. Stay Safe!

4 0
3 years ago
"Death Valley Hike"
Amanda [17]
I would go with Either E or A
7 0
3 years ago
Read 2 more answers
57:12
suter [353]

Answer:

d

Step-by-step explanation:

6 0
2 years ago
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