(B - A)2 - 81 or (B - A + 9)(B - A - 9) If the starting point, A, is taken as zero the the expression simplifies to (B + 9)(B - 9)
The square root of 81 is: ±9 (9 or -9)A square root is a number which, when multiplied by itself, equals the original number. As 9 x 9 = 81 and -9 x -9 = 81, the answer is plus or minus nine.
81 is the only one.
4x2-81
81 is a perfect square because 81 = 9 x 9
x2-81 = (x-9)(x+9)
(B - A)2 - 81 or (B - A + 9)(B - A - 9) If the starting point, A, is taken as zero the the expression simplifies to (B + 9)(B - 9)
81
9 or -9
I believe it is prime as you have written it. change the end to + 81 and it factors as (2x - 1)(x-9)(x+9)
(9 - 5u)(9 + 5u)
±9 (plus or minus 9).
if x is equal to the square root of 81 then x is ±9 (plus or minus 9)
It is 8(80b+81) when factored
81
(x - 9)(x^2 + 9x + 81)
The square root of 81 is: ±9 (9 or -9)A square root is a number which, when multiplied by itself, equals the original number. As 9 x 9 = 81 and -9 x -9 = 81, the answer is plus or minus nine.