Solve (x - 3)^2 = 81 quadratic equation

x=12

Step-by-step:

Square root both sides to get

x-3=9

Then take 3 to the other side

x=9+3

x=12

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,