One: 81 squared = 81^2 = 6561
78 minus78
79, -79
The square root of 81 squared is 81.
81 x 81 = 6561
9 x 9 = 81 9 squared = 81 3 squared times 3 squared = 81
lokiya said: 9 squared is equal to 81
-9 squared = 81(-9)^2 = (-9) * (-9) = 81
9x^(2) - 6xy + y^(2) - 81 9x^(2) - 81 + y^(2) - 6xy 9(x^(2) - 9)+ y(y - 6x) 9(x-3)(x + 3) + y(y - 6x) 9x^(2)
812 = 81 x 81 = 6,561
9 squared is 81 and 16 squared is 256
Nine square yards equals 81 square feet.
64 and 81 ; 64 is 8 squared and 81 is 9 squared