Question

) If 3^a = 729, then find the value of (3^a-5
)
^2​

Answer 1

Step-by-step explanation:

3^a = 729

729 = 3×3×3×3×3×3

= 3^6

a = 6

(3^a-5)^ 2

=(3^6-5)^2

=(3^1)^2

= 3 ^ 1×2

= 3^2

= 3×3

= 9