Answer:
(2 a - 5) (2 a + 5)
Step-by-step explanation:
Factor the following:
4 a^2 - 25
4 a^2 - 25 = (2 a)^2 - 5^2:
(2 a)^2 - 5^2
Factor the difference of two squares. (2 a)^2 - 5^2 = (2 a - 5) (2 a + 5):
Answer: (2 a - 5) (2 a + 5)
See below
It looks like
(x-5)² + y² = 4
formula of circle: (x-h)² + (y-k)² = r² where (h,k) is coordinate of center and r is radius
center: (5 , 0) r = 2
Equation: (x-5)² + y² = 4
20 -4 { 20÷ 7 ( 7 - 3 )}
20 -4 { 20 ÷ 7 * 4 }
20 - 4 { 2.85 * 4 }
16 * 11.42
182.85
