How do you solve #x-3=sqrt(30- 2x)#?
1 Answer
May 12, 2016
x=7
Explanation:
Isolate the square root on the left hand side:
Original:
Isolate:
Tidy up:
Eliminate the radical on the left hand side:
Raise both sides to the second power
Solve the quadratic equation:
This equation has two rational roots {x1,x2}={7,3}
Plug in the 7 as x
Simplify
x = 7