Answer: x=−3 or x=13
Step-by-step explanation:
Step 1: Subtract 39 from both sides.
x2−10x−39=39−39
x2−10x−39=0
Step 2: Factor left side of equation.
(x+3)(x−13)=0
Step 3: Set factors equal to 0.
x+3=0 or x−13=0
x=−3 or x=13
So, we have the following equation...

To do this its pretty simple just multiply 12 by 4.
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Your final answer is
!
I only need 3 more brainliests so if i could get one that would be a big help!
Again just substitute ,the answer is B
Given:
Diagram of a circle and its two secant from an exterior point.
To find:
The value of x.
Solution:
We know that, If two secant are on a circle from an exterior point, then the products of measure of secants and measure of external segments of secants are equal.
Using the above property, we get




Splitting the middle term, we get



Using zero product property, we get
and 
and 
Side cannot be negative.
Therefore, the only possible value of x is 1.
Answer:
x=20
Step-by-step explanation:
Firstly add 8 in both sides.
Or,x-8=12
or,x-8+8=12+8
Add up:
Or,x=20

