Solve 101x^2+104x+3<0

$$101 x ^ { 2 } + 104 x + 3 < 0$$

Solve for x

$$x\in \left(-1,-\frac{3}{101}\right)$$

Steps Using the Quadratic Formula

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.

$$101x^{2}+104x+3=0$$

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 101 for a, 104 for b, and 3 for c in the quadratic formula.

$$x=\frac{-104±\sqrt{104^{2}-4\times 101\times 3}}{2\times 101}$$

Do the calculations.

$$x=\frac{-104±98}{202}$$

Solve the equation x=\frac{-104±98}{202} when ± is plus and when ± is minus.

$$x=-\frac{3}{101} x=-1$$

Rewrite the inequality by using the obtained solutions.

$$101\left(x+\frac{3}{101}\right)\left(x+1\right)<0$$

For the product to be negative, x+\frac{3}{101} and x+1 have to be of the opposite signs. Consider the case when x+\frac{3}{101} is positive and x+1 is negative.

$$x+\frac{3}{101}>0 x+1<0$$

This is false for any x.

$$x\in \emptyset$$

Consider the case when x+1 is positive and x+\frac{3}{101} is negative.

$$x+1>0 x+\frac{3}{101}<0$$

The solution satisfying both inequalities is x\in \left(-1,-\frac{3}{101}\right).

$$x\in \left(-1,-\frac{3}{101}\right)$$

The final solution is the union of the obtained solutions.

$$x\in \left(-1,-\frac{3}{101}\right)$$