(X^2+6x)^2+14(x^2+6x)+45=0

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Solution for (X^2+6x)^2+14(x^2+6x)+45=0 equation: 



(X^2+6X)^2+14(X^2+6X)+45=0

We multiply parentheses

14X^2+(X^2+6X)^2+84X+45=0

We add all the numbers together, and all the variables

14X^2+84X+(X^2+6X)^2+45=0

We move all terms containing X to the left, all other terms to the right

14X^2+84X+(X^2+6X)^2=-45

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