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Please help me with this problem
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Please help me with this problem

Please help me with this problem-example-1
User Patato
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1 Answer

6 votes

Answer:

A

Explanation:

√-2x - 5 = x + 4

(squared)

---> (√-2x - 5)² = (x + 4)²

---> -2x - 5 = x² + 8x + 16

---> 0 = x² + 8x + 2x + 16 + 5

---> 0 = x² + 10x + 21

---> (x + 7) (x + 3)

x = -7 or x = -3

conclusion : A. Both -7 or -3 are extraneous

User Henley
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