Answer:
- 1
Explanation:
( x + 4 )² + 38 = 47
( x + 4 )² = 47 - 38
( x + 4 )² = 9
( x + 4 )² = 3²
Square root on both sides,
x + 4 = 3
x = 3 - 4
x = - 1
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