Answer:
x = 4
Explanation:
given 2 secants drawn from an external point to the circle, then the product of one secant's external part and that entire secant is equal to the product of the other secant's external part and that entire secant, that is
x(x + 4x) = 8(8 + 2)
x(5x) = 8(10)
5x² = 80 ( divide both sides by 5 )
x² = 16 ( take square root of both sides )
x =
= 4