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Sagot :
Answer:
3
Step-by-step explanation:
[tex] \sf \sqrt{x + 3 = 12} [/tex]
[tex] \sf = \sqrt{x = 12 - 3} [/tex]
[tex] \sf = \sqrt{x = 9} [/tex]
[tex] \sf = \sqrt{9} [/tex]
[tex] \sf = \sqrt{3 \times 3} [/tex]
= 3
Answer:
x = 81
Step-by-step explanation:
Combine like terms: √x+3=12 becomes √x+3- 3= 12 - 3, or √x = 9.
Square both sides to obtain x: x = 81
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