9x^2-kx+81=0

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Solution for 9x^2-kx+81=0 equation:


Simplifying
9x2 + -1kx + 81 = 0

Reorder the terms:
81 + -1kx + 9x2 = 0

Solving
81 + -1kx + 9x2 = 0

Solving for variable 'k'.

Move all terms containing k to the left, all other terms to the right.

Add '-81' to each side of the equation.
81 + -1kx + -81 + 9x2 = 0 + -81

Reorder the terms:
81 + -81 + -1kx + 9x2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -1kx + 9x2 = 0 + -81
-1kx + 9x2 = 0 + -81

Combine like terms: 0 + -81 = -81
-1kx + 9x2 = -81

Add '-9x2' to each side of the equation.
-1kx + 9x2 + -9x2 = -81 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-1kx + 0 = -81 + -9x2
-1kx = -81 + -9x2

Divide each side by '-1x'.
k = 81x-1 + 9x

Simplifying
k = 81x-1 + 9x

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