Question

how did I get the circled part? I didn't understand the previous step :'(​

Answer 1

Answer:

$2(3 {}^{n} - 3 {}^{n - 1} ) = 2(3 {}^{n} \times \frac{3}{3} - 3 {}^{n - 1} )$

$2(( 3 {}^{n - 1} \times 3)- 3 {}^{n - 1} ) = 2(3 {}^{n - 1} (3 - 1))$

Please mark as BRAINLIEST and Give HEART :)