solve the following equation 9+v(x-1)=1

Question

a. 65
b. 63
c. -7
d. no real solution

Answer 1

 

 9 + √(X -1 ) = 1

 

 √(X -1 ) = -8   This equation has no solution, because square roots can not have a negative value. 

 

   X - 1 = 64

 

 X = 65  ,   Test: √ (65 -1 ) = √ 64 = 8 

 

    if it was meant to be negative square root of 64 , the equation should be 

     

     9 - √ (X -1) = 9.