r(x)=4x^2+12x+9

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Solution for r(x)=4x^2+12x+9 equation: 


Simplifying
r(x) = 4x2 + 12x + 9

Multiply r * x
rx = 4x2 + 12x + 9

Reorder the terms:
rx = 9 + 12x + 4x2

Solving
rx = 9 + 12x + 4x2

Solving for variable 'r'.

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

Divide each side by 'x'.
r = 9x-1 + 12 + 4x

Simplifying
r = 9x-1 + 12 + 4x

Reorder the terms:
r = 12 + 9x-1 + 4x

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