81 = x²
√81 = x
√9 × 9 = x
9 = x
Verification :-
9 × 9 = 81
9² = 81.
So, the value of x is 9.
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Comment if you've any doubts!
RainbowSalt2222 ☔
Answer:
X = ± 9
Step-by-step explanation:
81 = x² , that is
x² = 81 ( take the square root of both sides )
x = ± [tex]\sqrt{81}[/tex] = ± 9
As a check
9² = 9 × 9 = 81 and (- 9) × (- 9) = 81
