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Earn +20 ptsQ: How do you solve x squared equals negative 81?
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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
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