Answer:
5.6
Step-by-step explanation:
Answer:
x = -2 0r x = 6
Step-by-step explanation:
from the question
X² – 4x – 12=0
solve by completing the square method
we have;
X² – 4x – 12=0
X² – 4x = 12
to make the left hand side a perfect square we add 4 to both sides.
X² -4x + 4 = 12 + 4
X² -4x + 4 = 16
from left hand side X² -4x + 4
= (x -2) × ( x -2)
it can be simply expressed as
( x-2)²
so since X² -4x + 4 has been simplified to be ( x-2)²
then,
( x-2)² = 16
x - 2 = √ 16
since square root has two values it can either be positive or negative
so we have
x = 2 + √16
or
x = 2 - √16
therefore
x = 2 + √16
x = 2 + 4
x = 6
0r
x = 2 - 4
x = -2
simplifying ![\frac{\sqrt{4}}{\sqrt[3]{4}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B4%7D%7D%7B%5Csqrt%5B3%5D%7B4%7D%7D)
we get 
Option B is correct.
Step-by-step explanation:
We need to simplify:
Solving:
We know that √ = 1/2 and ∛=1/3
Applying exponent rule: 
So, simplifying we get
Option B is correct.
Keywords: Solving Exponents
Learn more about Solving Exponents at:
#learnwithBrainly
Answer:
4/5
Step-by-step explanation:
.8% is equal to 80%
80% of 100 is 80/100
simplified the answer is 4/5
