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12x^{2}+12x+3=0
To solve the inequality, factor the left hand side. Quadratic polynomial can be factored using the transformation ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right), where x_{1} and x_{2} are the solutions of the quadratic equation ax^{2}+bx+c=0.
x=\frac{-12±\sqrt{12^{2}-4\times 12\times 3}}{2\times 12}
All equations of the form ax^{2}+bx+c=0 can be solved using the quadratic formula: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. Substitute 12 for a, 12 for b, and 3 for c in the quadratic formula.
x=\frac{-12±0}{24}
Do the calculations.
x=-\frac{1}{2}
Solutions are the same.
12\left(x+\frac{1}{2}\right)^{2}>0
Rewrite the inequality by using the obtained solutions.
x\neq -\frac{1}{2}
Inequality holds for x\neq -\frac{1}{2}.