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Sonja [21]
2 years ago
13

Select the correct answer.

Mathematics
1 answer:
juin [17]2 years ago
7 0

Answer:

81

Step-by-step explanation:

\sqrt{x}  + 3 = 12 \\  \\  \sqrt{x}  = 12 - 3 \\  \\  \sqrt{x}  = 9 \\  \\  {( \sqrt{x} )}^{2}  =  {(9)}^{2}  \\  \\ x = 81

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