f(x)=(x+a)(x-b)

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Solution for f(x)=(x+a)(x-b) equation:


Simplifying
f(x) = (x + a)(x + -1b)

Multiply f * x
fx = (x + a)(x + -1b)

Reorder the terms:
fx = (a + x)(x + -1b)

Reorder the terms:
fx = (a + x)(-1b + x)

Multiply (a + x) * (-1b + x)
fx = (a(-1b + x) + x(-1b + x))
fx = ((-1b * a + x * a) + x(-1b + x))
fx = ((-1ab + ax) + x(-1b + x))
fx = (-1ab + ax + (-1b * x + x * x))
fx = (-1ab + ax + (-1bx + x2))
fx = (-1ab + ax + -1bx + x2)

Solving
fx = -1ab + ax + -1bx + x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -1abx-1 + a + -1b + x

Simplifying
f = -1abx-1 + a + -1b + x

Reorder the terms:
f = a + -1abx-1 + -1b + x

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