Question

Solve:
√a=a-6.
What is the extraneous solution?
Enter your answer in the box.

Answer 1

Explanation:

√a = a-6

a = (a-6)²

=> a = a² -2*a*6 + 6²

=> a = a² -12a +36

=> 13a = a² + 36

a = a² +36/13