Identify the single row operation that transforms the matrix

Identify the single row operation that transforms the matrix as shown: [10 -4 | 9 -5 2 | -4.5] rightarow [10 -4 |9 -10 4 | -9] -2R_2 rightarrow R_2 2R_2 + R_1 rightarrow R_1 B. 0.5 R_1 + R_2 rightarrow R_2 R_1 + R_2 rightarrow R_2

Solution

in second row

-5 became -10

2 became 4 and

-4.5 became 9 ,

clearly second row is multiplied by 2 so option A