Solve V=VV

$$V = V V$$

Solve for V

$$V=1$$

$$V=0$$

Steps Using Factoring

Multiply V and V to get V^{2}.

$$V=V^{2}$$

Subtract V^{2} from both sides.

$$V-V^{2}=0$$

Factor out V.

$$V\left(1-V\right)=0$$

To find equation solutions, solve V=0 and 1-V=0.

$$V=0 V=1$$

Steps Using the Quadratic Formula

Multiply V and V to get V^{2}.

$$V=V^{2}$$

Subtract V^{2} from both sides.

$$V-V^{2}=0$$

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.

$$-V^{2}+V=0$$

This equation is in standard form: ax^{2}+bx+c=0. Substitute -1 for a, 1 for b, and 0 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$V=\frac{-1±\sqrt{1^{2}}}{2\left(-1\right)}$$

Take the square root of 1^{2}.

$$V=\frac{-1±1}{2\left(-1\right)}$$

Multiply 2 times -1.

$$V=\frac{-1±1}{-2}$$

Now solve the equation V=\frac{-1±1}{-2} when ± is plus. Add -1 to 1.

$$V=\frac{0}{-2}$$

Divide 0 by -2.

$$V=0$$

Now solve the equation V=\frac{-1±1}{-2} when ± is minus. Subtract 1 from -1.

$$V=-\frac{2}{-2}$$

Divide -2 by -2.

$$V=1$$

The equation is now solved.

$$V=0 V=1$$

Steps for Completing the Square

Multiply V and V to get V^{2}.

$$V=V^{2}$$

Subtract V^{2} from both sides.

$$V-V^{2}=0$$

Quadratic equations such as this one can be solved by completing the square. In order to complete the square, the equation must first be in the form x^{2}+bx=c.

$$-V^{2}+V=0$$

Divide both sides by -1.

$$\frac{-V^{2}+V}{-1}=\frac{0}{-1}$$

Dividing by -1 undoes the multiplication by -1.

$$V^{2}+\frac{1}{-1}V=\frac{0}{-1}$$

Divide 1 by -1.

$$V^{2}-V=\frac{0}{-1}$$

Divide 0 by -1.

$$V^{2}-V=0$$

Divide -1, the coefficient of the x term, by 2 to get -\frac{1}{2}. Then add the square of -\frac{1}{2} to both sides of the equation. This step makes the left hand side of the equation a perfect square.

$$V^{2}-V+\left(-\frac{1}{2}\right)^{2}=\left(-\frac{1}{2}\right)^{2}$$

Square -\frac{1}{2} by squaring both the numerator and the denominator of the fraction.

$$V^{2}-V+\frac{1}{4}=\frac{1}{4}$$

Factor V^{2}-V+\frac{1}{4}. In general, when x^{2}+bx+c is a perfect square, it can always be factored as \left(x+\frac{b}{2}\right)^{2}.

$$\left(V-\frac{1}{2}\right)^{2}=\frac{1}{4}$$

Take the square root of both sides of the equation.

$$\sqrt{\left(V-\frac{1}{2}\right)^{2}}=\sqrt{\frac{1}{4}}$$

Simplify.

$$V-\frac{1}{2}=\frac{1}{2} V-\frac{1}{2}=-\frac{1}{2}$$

Add \frac{1}{2} to both sides of the equation.

$$V=1 V=0$$