Question

X2-81=0Пжпжжпжпжпжпжпжежжежежежже​

Answer 1

Ответ:

х²-81=0

х²=81

х=±√81

х=9  и  х=-9.

Объяснение:

Answer 2

It appears you've entered an equation: X^2 - 81 = 0. This is a quadratic equation, and you can solve it for X.

To solve for X, you can use the difference of squares formula:

X^2 - 81 = 0

(X - 9)(X + 9) = 0

Now, set each factor equal to zero and solve for X:

1. X - 9 = 0 X = 9

2. X + 9 = 0 X = -9

So, the solutions to the equation X^2 - 81 = 0 are X = 9 and X = -9.