(x-k)(x+2k)=x^2-3x-18

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Solution for (x-k)(x+2k)=x^2-3x-18 equation:


Simplifying
(x + -1k)(x + 2k) = x2 + -3x + -18

Reorder the terms:
(-1k + x)(x + 2k) = x2 + -3x + -18

Reorder the terms:
(-1k + x)(2k + x) = x2 + -3x + -18

Multiply (-1k + x) * (2k + x)
(-1k * (2k + x) + x(2k + x)) = x2 + -3x + -18
((2k * -1k + x * -1k) + x(2k + x)) = x2 + -3x + -18

Reorder the terms:
((-1kx + -2k2) + x(2k + x)) = x2 + -3x + -18
((-1kx + -2k2) + x(2k + x)) = x2 + -3x + -18
(-1kx + -2k2 + (2k * x + x * x)) = x2 + -3x + -18
(-1kx + -2k2 + (2kx + x2)) = x2 + -3x + -18

Reorder the terms:
(-1kx + 2kx + -2k2 + x2) = x2 + -3x + -18

Combine like terms: -1kx + 2kx = 1kx
(1kx + -2k2 + x2) = x2 + -3x + -18

Reorder the terms:
1kx + -2k2 + x2 = -18 + -3x + x2

Add '-1x2' to each side of the equation.
1kx + -2k2 + x2 + -1x2 = -18 + -3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
1kx + -2k2 + 0 = -18 + -3x + x2 + -1x2
1kx + -2k2 = -18 + -3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
1kx + -2k2 = -18 + -3x + 0
1kx + -2k2 = -18 + -3x

Solving
1kx + -2k2 = -18 + -3x

Solving for variable 'k'.

Reorder the terms:
18 + 1kx + -2k2 + 3x = -18 + -3x + 18 + 3x

Reorder the terms:
18 + 1kx + -2k2 + 3x = -18 + 18 + -3x + 3x

Combine like terms: -18 + 18 = 0
18 + 1kx + -2k2 + 3x = 0 + -3x + 3x
18 + 1kx + -2k2 + 3x = -3x + 3x

Combine like terms: -3x + 3x = 0
18 + 1kx + -2k2 + 3x = 0

The solution to this equation could not be determined.

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