f(X)=(x^2+2X)(X-3)

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Solution for f(X)=(x^2+2X)(X-3) equation: 


Simplifying
f(X) = (x2 + 2X)(X + -3)

Multiply f * X
fX = (x2 + 2X)(X + -3)

Reorder the terms:
fX = (2X + x2)(X + -3)

Reorder the terms:
fX = (2X + x2)(-3 + X)

Multiply (2X + x2) * (-3 + X)
fX = (2X * (-3 + X) + x2(-3 + X))
fX = ((-3 * 2X + X * 2X) + x2(-3 + X))
fX = ((-6X + 2X2) + x2(-3 + X))
fX = (-6X + 2X2 + (-3 * x2 + X * x2))
fX = (-6X + 2X2 + (-3x2 + x2X))
fX = (-6X + 2X2 + -3x2 + x2X)

Solving
fX = -6X + 2X2 + -3x2 + x2X

Solving for variable 'f'.

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

Divide each side by 'X'.
f = -6 + 2X + -3x2X-1 + x2

Simplifying
f = -6 + 2X + -3x2X-1 + x2

Reorder the terms:
f = -6 + 2X + x2 + -3x2X-1

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