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X^2-6X+36=(X+6)(X-6)
We move all terms to the left:
X^2-6X+36-((X+6)(X-6))=0
We use the square of the difference formula
X^2+X^2-6X+36+36=0
We add all the numbers together, and all the variables
2X^2-6X+72=0
a = 2; b = -6; c = +72;
Δ = b2-4ac
Δ = -62-4·2·72
Δ = -540
Delta is less than zero, so there is no solution for the equation
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