If \(\sqrt{x^2 + 9}\) = x + 1, solve for x
A
5
B
4
C
3
D
2
E
1
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
\(\sqrt{x^2 + 9}\) = x + 1
x\(^2\) + 9 = (x + 1)\(^2\)
0 = x\(^2\) + 2x + 1 - x\(^2\) - 9
= 2x - 8 = 0
2(x - 4) = 0
x = 4
Source: Myschool Past Questions Archive (Record #31158)