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

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


Simplifying
x2 + -3x + -18 = (x + -1a)(x + 3)

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

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

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

Multiply (-1a + x) * (3 + x)
-18 + -3x + x2 = (-1a * (3 + x) + x(3 + x))
-18 + -3x + x2 = ((3 * -1a + x * -1a) + x(3 + x))
-18 + -3x + x2 = ((-3a + -1ax) + x(3 + x))
-18 + -3x + x2 = (-3a + -1ax + (3 * x + x * x))
-18 + -3x + x2 = (-3a + -1ax + (3x + x2))
-18 + -3x + x2 = (-3a + -1ax + 3x + x2)

Add '-1x2' to each side of the equation.
-18 + -3x + x2 + -1x2 = -3a + -1ax + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-18 + -3x + 0 = -3a + -1ax + 3x + x2 + -1x2
-18 + -3x = -3a + -1ax + 3x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-18 + -3x = -3a + -1ax + 3x + 0
-18 + -3x = -3a + -1ax + 3x

Solving
-18 + -3x = -3a + -1ax + 3x

Solving for variable 'x'.

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

Add 'ax' to each side of the equation.
-18 + ax + -3x = -3a + -1ax + ax + 3x

Combine like terms: -1ax + ax = 0
-18 + ax + -3x = -3a + 0 + 3x
-18 + ax + -3x = -3a + 3x

Add '-3x' to each side of the equation.
-18 + ax + -3x + -3x = -3a + 3x + -3x

Combine like terms: -3x + -3x = -6x
-18 + ax + -6x = -3a + 3x + -3x

Combine like terms: 3x + -3x = 0
-18 + ax + -6x = -3a + 0
-18 + ax + -6x = -3a

Add '18' to each side of the equation.
-18 + ax + 18 + -6x = 18 + -3a

Reorder the terms:
-18 + 18 + ax + -6x = 18 + -3a

Combine like terms: -18 + 18 = 0
0 + ax + -6x = 18 + -3a
ax + -6x = 18 + -3a

Reorder the terms:
-18 + 3a + ax + -6x = 18 + -3a + -18 + 3a

Reorder the terms:
-18 + 3a + ax + -6x = 18 + -18 + -3a + 3a

Combine like terms: 18 + -18 = 0
-18 + 3a + ax + -6x = 0 + -3a + 3a
-18 + 3a + ax + -6x = -3a + 3a

Combine like terms: -3a + 3a = 0
-18 + 3a + ax + -6x = 0

The solution to this equation could not be determined.

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