#2sqrt (6a + 7) - 2a = 0? #solve the equation
Restrict the domain so that the expression under the radical never becomes negative:
Divide the equation by 2:
Add "a" to both sides:
Square both sides:
Please notice that I have can discarded the restriction because neither root violates it.
The negative root must be discarded; it is an erroneous root introduced by squaring.