Find All Values of X Satisfying the Given Conditions $y = x ^ { 2 } + 4 x$

question 403

Multiple Choice

Find all values of x satisfying the given conditions.
- $y = x ^ { 2 } + 4 x$ and $y = 40$

• A) \(2 \sqrt { 11 } \pm 2\)
• B) \(- 2 \pm 2 \sqrt { 22 }\)
• C) \(- 2 \pm 2 \sqrt { 11 }\)
• D) \(\pm 2 \sqrt { 11 }\)