Question

For what value of the constant c does the above equation have x = 2 as the only solution?

A. -41

B. -1

C. 2

D. 41

Answer 1

The answers is A, -41.

Answer 2

The answer is A. -41
1) plug in 2 for all x values
2) combine like terms
3) square both sides of the equation to get rid of the square root sign
4) add 16 to both sides
5) divide by -1