x2=-81take the square root of both sidessince 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
81 x 81 = 6561
x2 + 9x2 = 10x2
812 = 81 x 81 = 6,561
9x2-9x = 0 x2-x = 0 x(x-1) = 0 x = 1 or x = 0
If you mean: x squared+9x+14 = 0 then by using the quadratic equation formula x = -2 or x = -7
3x2-9x = 0 x(3x-9) = 0 x = 0 or x = 3
x2-9x can be factored by taking x out of each term x(x-9)
9x+27 = -81 9x = -81-27 9x = -108 x = -12
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. Hope I Helped :D
32 + x = 259 + x = 25x = 25 - 9x = 16
9x - 20 = 61 Add 20 to both sides: 9x = 81 Divide both sides by 9: x = 9
- 8x2
Use the quadratic formula. x = -4.265564 or -0.234436
x2=-81take the square root of both sidessince 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
If: x square+9x-22 then it is (x-2)(x+11) when factored
(9x2 + 7)(9x2 - 7) = 81x4 - 49