Perform the row operation on the given augmented matrix [ 1 2 -4| -5 ][ 8 6 5| 2][-5 6 1| 4]. -8r1+r2

GG easy mah dude

-8R1+R2 means take row 1, multiply it by -8 and add it to the 2nd row

-8R1=-8 -16 32 | 40

adding tat to the 2nd row we get

0 -10 37 | 42

so the resulting matrix is

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐