3x^2+kx-81=0

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Solution for 3x^2+kx-81=0 equation:


Simplifying
3x2 + kx + -81 = 0

Reorder the terms:
-81 + kx + 3x2 = 0

Solving
-81 + kx + 3x2 = 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 + kx + 81 + 3x2 = 0 + 81

Reorder the terms:
-81 + 81 + kx + 3x2 = 0 + 81

Combine like terms: -81 + 81 = 0
0 + kx + 3x2 = 0 + 81
kx + 3x2 = 0 + 81

Combine like terms: 0 + 81 = 81
kx + 3x2 = 81

Add '-3x2' to each side of the equation.
kx + 3x2 + -3x2 = 81 + -3x2

Combine like terms: 3x2 + -3x2 = 0
kx + 0 = 81 + -3x2
kx = 81 + -3x2

Divide each side by 'x'.
k = 81x-1 + -3x

Simplifying
k = 81x-1 + -3x

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