Solve --x^2+6x-2

$$- - x ^ { 2 } + 6 x - 2$$

Factor

$$\left(x-\left(-\sqrt{11}-3\right)\right)\left(x-\left(\sqrt{11}-3\right)\right)$$

Steps Using the Quadratic Formula

Multiply -1 and -1 to get 1.

$$factor(x^{2}+6x-2)$$

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.

$$x^{2}+6x-2=0$$

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.

$$x=\frac{-6±\sqrt{6^{2}-4\left(-2\right)}}{2}$$

Square 6.

$$x=\frac{-6±\sqrt{36-4\left(-2\right)}}{2}$$

Multiply -4 times -2.

$$x=\frac{-6±\sqrt{36+8}}{2}$$

Add 36 to 8.

$$x=\frac{-6±\sqrt{44}}{2}$$

Take the square root of 44.

$$x=\frac{-6±2\sqrt{11}}{2}$$

Now solve the equation x=\frac{-6±2\sqrt{11}}{2} when ± is plus. Add -6 to 2\sqrt{11}.

$$x=\frac{2\sqrt{11}-6}{2}$$

Divide -6+2\sqrt{11} by 2.

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

Now solve the equation x=\frac{-6±2\sqrt{11}}{2} when ± is minus. Subtract 2\sqrt{11} from -6.

$$x=\frac{-2\sqrt{11}-6}{2}$$

Divide -6-2\sqrt{11} by 2.

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

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

$$x^{2}+6x-2=\left(x-\left(\sqrt{11}-3\right)\right)\left(x-\left(-\sqrt{11}-3\right)\right)$$

Evaluate

$$x^{2}+6x-2$$

Solution Steps

Multiply -1 and -1 to get 1.

$$x^{2}+6x-2$$