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What is the value of x, when x2 + 5 = 21? A) 2 or -2 B) 4 or -4 C) 5.5 or -5.5 D) 8 or -8
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What is the value of x, when x2 + 5 = 21? A) 2 or -2 B) 4 or -4 C) 5.5 or -5.5 D) 8 or -8

User Goli Nikitha
by
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1 Answer

5 votes

Answer:

x2 + 5 = 21

(b )

x = 4 or -4

User Kamituel
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