Best Answer

The answer? There is no "answer" There cannot be an answer because they are all different. In order to make calculations, the variables have to be the same. x squared, xy, y squared are the variables, and none of them match. Therefore your "answer" must look like this:

9x squared - 6xy + y squared - 81.

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Q: What is 9x squared minus 6xy plus y squared minus 81?

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9x2 - 6xy + y2 - 81 = (3x - y)2 - 92 = (3x - y - 9)(3x - y + 9)

9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 = (3x - y - 9)*(3x - y + 9)

Type your answer here... 81

78 minus78

79, -79

(2x - 9)(2x - 9) or (2x - 9)2

36 + 42 - 6 + 28 - 43 + 81 - 6 = 132

9x^2-6xy+y^2 = (y-3x)^2 (y-3x)^2-81 -> ((y-3x)+9)((y-3x)-9)

81 x 2 - 16 = 146

x2-81 = (x-9)(x+9)

(9x)2 +9x/(45x)2 +81= 9+9x/86

(9 - 5u)(9 + 5u)

(3x - y - 9)(3x - y + 9)

(3x - y)(3x - y) - 81

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)

9x2 - 6xy + y2 - 81 = (3x - y)2 - 81 (since the first three terms make a perfect square = (3x - y - 9)(3x - y + 9) since the expression now is a difference of two squares.

(2x - 9)(2x +9)

-4 plus 85x81 is equal to 6,881.

Â±9 (plus or minus 9).

V= 47. 81 + 47 - 13= 47.

9 squared equals 81.

Yes. Nice work!

The square root of 81 squared is 81.

One: 81 squared = 81^2 = 6561

Because: (9-x)(9-x) = 81-18x+x^2