Answer:
12
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
I’m sorry but I can’t understand what the question is saying
Answer:
You can proceed as follows:
Step-by-step explanation:
First solve the quadratic inequality
. To do that, factorize, then we have that
. This implies that

or

In the first case the solution is the empty set
. In the second case the solution is the interval
. Now we have that
![A=[1,4]](https://tex.z-dn.net/?f=A%3D%5B1%2C4%5D)

.
To show that
consider
. Then
, this implies that
, then
. Now, to show that
consider
, then
, then
, then
, this implies that
.
Observe the image below.
When negative five is subtracted from a number the result is 10. The number is 5.
x - (-5) = 10
x + 5 = 10
x = 10 - 5
x = 5