The positive solutions of the equation
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Let's have an example
4x^2-36=0
(2x-6)(2x+6)=0
2x-6=0
2x+6=0
x=-3 or 3 but positive solution is 3
4x^2-36=0
(2x-6)(2x+6)=0
2x-6=0
2x+6=0
x=-3 or 3 but positive solution is 3
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