Answer:
18
Step-by-step explanation:
<u>Intersecting Secant-Tangent Theorem</u>
The square of the tangent is equal to the product of the external secant segment and the secant.
Given:
AE² = EC · ED
⇒ 12² = 8(18 + x)
⇒ 144 = 144 + 8x
⇒ 0 = 8x
⇒ x = 0
ED = 18 + x
= 18 + 0
= 18
a = 4, b = 0
Also, a = 0 and b = 0 :)
Associative property of addition
(4+10)+(-10)
We want to change the parentheses to
4 + ( 10 + -10)
We can use the Associative property of addition
( a+b) + c = a+ ( b+c)
