We have two lines from the same point.
These two lines are also tangents to same circle which implies that they are of the same length.
That is 2x - 1 = 9
2x = 9 +1 = 10
x =10/2
x = 5
Answer:
(x - 4)(x + 4)
Step-by-step explanation:
x² - 16 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , then
x² - 16
= x² - 4²
= (x - 4)(x + 4)
Surface area of a cylinder: 2B + Ch
Word form: 2(area of base) + (circumference of base)(height)
Find the numbers you need to plug in to the formula.
Area of base:

2² = <span>12.57 m</span>²<span>
</span>
Circumference of base: 2

2 = 12.57 m
Height: 12 m
Plug these numbers in to the formula.
2(12.57) + (12.57)(12) = 175.98
The SA of the cylinder is 175.98 m².