Solve 11x^2+3x

$$11 { x }^{ 2 } +3x$$

Factor

$$x\left(11x+3\right)$$

Solution Steps

Factor out x.

$$x\left(11x+3\right)$$

Steps Using the Quadratic Formula

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.

$$11x^{2}+3x=0$$

All equations of the form ax^{2}+bx+c=0 can be solved using the quadratic formula: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. The quadratic formula gives two solutions, one when ± is addition and one when it is subtraction.

$$x=\frac{-3±\sqrt{3^{2}}}{2\times 11}$$

Take the square root of 3^{2}.

$$x=\frac{-3±3}{2\times 11}$$

Multiply 2 times 11.

$$x=\frac{-3±3}{22}$$

Now solve the equation x=\frac{-3±3}{22} when ± is plus. Add -3 to 3.

$$x=\frac{0}{22}$$

Divide 0 by 22.

$$x=0$$

Now solve the equation x=\frac{-3±3}{22} when ± is minus. Subtract 3 from -3.

$$x=-\frac{6}{22}$$

Reduce the fraction \frac{-6}{22} to lowest terms by extracting and canceling out 2.

$$x=-\frac{3}{11}$$

Factor the original expression using ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right). Substitute 0 for x_{1} and -\frac{3}{11} for x_{2}.

$$11x^{2}+3x=11x\left(x-\left(-\frac{3}{11}\right)\right)$$

Simplify all the expressions of the form p-\left(-q\right) to p+q.

$$11x^{2}+3x=11x\left(x+\frac{3}{11}\right)$$

Add \frac{3}{11} to x by finding a common denominator and adding the numerators. Then reduce the fraction to lowest terms if possible.

$$11x^{2}+3x=11x\times \frac{11x+3}{11}$$

Cancel out 11, the greatest common factor in 11 and 11.

$$11x^{2}+3x=x\left(11x+3\right)$$

Evaluate

$$x\left(11x+3\right)$$