f(x)=9x-1+x(10x-2)

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Solution for f(x)=9x-1+x(10x-2) equation:


Simplifying
f(x) = 9x + -1 + x(10x + -2)

Multiply f * x
fx = 9x + -1 + x(10x + -2)

Reorder the terms:
fx = 9x + -1 + x(-2 + 10x)
fx = 9x + -1 + (-2 * x + 10x * x)
fx = 9x + -1 + (-2x + 10x2)

Reorder the terms:
fx = -1 + 9x + -2x + 10x2

Combine like terms: 9x + -2x = 7x
fx = -1 + 7x + 10x2

Solving
fx = -1 + 7x + 10x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -1x-1 + 7 + 10x

Simplifying
f = -1x-1 + 7 + 10x

Reorder the terms:
f = 7 + -1x-1 + 10x

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