0
x2=-81
take the square root of both sides
since 81 is negative you need to take 81 times i when i=-1 then solve as the square root of 81. your answer is x=9i
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What is 81 squared?
81 x 81 = 6561
What is negative 9 squared?
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
What is 9 to the 2nd power?
92=9x9=81 9 to the second power or 9 squared (92) equals 81.
How do you solve 3 to the power of negative 2x plus 2 equals 81?
3^(-2x + 2) = 81? log(3^(-2x + 2)) = log(81) (-2x+2)log(3) = log(81) -2x = log(81)/log(3) - 2 x = (-1/2)(log(81)/log(3)) + 1
9 squared plus b squared equals 12 squared?
92 = 81122 = 14481 + b2 = 144(take 81 from both sides)b2 = 63b = 7.937253933
What is 81 squared?
81 x 81 = 6561
What is negative 9 squared?
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
What number equals 81 when it is squared?
.12
Why is negative 9 squared negative 81?
It isn't. The square of any real number is positive. (negative 9)2 = positive 81. Did you mean negative (92) ? Well, 92 = 81, and the negative of that is negative 81.
How do you solve x2 81 equals 0?
x: x2 - 81 = 0
What so the ninth squared number?
It is 81 because 9 times 9 equals 81
How do you solve 3 to the power of what equals 81?
34 = 81 so x is 4
Nine yards squared is equal to how many feet squared?
Nine square yards equals 81 square feet.
What is 9 to the 2nd power?
92=9x9=81 9 to the second power or 9 squared (92) equals 81.
Solve 3x - 5x plus 11x equals -81?
23
What is the root of 81 squared?
The square root of 81 squared is 81.
What is x squared equals 9 squared - 2x squared?
7
