9*x^2+k*x+4=0

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Solution for 9*x^2+k*x+4=0 equation: 


Simplifying
9x2 + k * x + 4 = 0

Multiply k * x
9x2 + kx + 4 = 0

Reorder the terms:
4 + kx + 9x2 = 0

Solving
4 + kx + 9x2 = 0

Solving for variable 'k'.

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

Add '-4' to each side of the equation.
4 + kx + -4 + 9x2 = 0 + -4

Reorder the terms:
4 + -4 + kx + 9x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + kx + 9x2 = 0 + -4
kx + 9x2 = 0 + -4

Combine like terms: 0 + -4 = -4
kx + 9x2 = -4

Add '-9x2' to each side of the equation.
kx + 9x2 + -9x2 = -4 + -9x2

Combine like terms: 9x2 + -9x2 = 0
kx + 0 = -4 + -9x2
kx = -4 + -9x2

Divide each side by 'x'.
k = -4x-1 + -9x

Simplifying
k = -4x-1 + -9x

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