Solve by Factoring 3x^2+6x+3=0

$3 x^{2} + 6 x + 3 = 0$

Step 1

Factor $3$ out of $3 x^{2} + 6 x + 3$ .

Factor $3$ out of $3 x^{2}$ .

$3 (x^{2}) + 6 x + 3 = 0$

Factor $3$ out of $6 x$ .

$3 (x^{2}) + 3 (2 x) + 3 = 0$

Factor $3$ out of $3$ .

$3 (x^{2}) + 3 (2 x) + 3 (1) = 0$

Factor $3$ out of $3 (x^{2}) + 3 (2 x)$ .

$3 (x^{2} + 2 x) + 3 (1) = 0$

Factor $3$ out of $3 (x^{2} + 2 x) + 3 (1)$ .

$3 (x^{2} + 2 x + 1) = 0$

Step 2

Factor using the perfect square rule.

Rewrite $1$ as $1^{2}$ .

$3 (x^{2} + 2 x + 1^{2}) = 0$

Check that the middle term is two times the product of the numbers being squared in the first term and third term.

$2 x = 2 \cdot x \cdot 1$

Rewrite the polynomial.

$3 (x^{2} + 2 \cdot x \cdot 1 + 1^{2}) = 0$

Factor using the perfect square trinomial rule $a^{2} + 2 a b + b^{2} = {(a + b)}^{2}$ , where $a = x$ and $b = 1$ .

$3 {(x + 1)}^{2} = 0$

Step 3

Divide each term in $3 {(x + 1)}^{2} = 0$ by $3$ and simplify.

Divide each term in $3 {(x + 1)}^{2} = 0$ by $3$ .

$\frac{3 {(x + 1)}^{2}}{3} = \frac{0}{3}$

Simplify the left side.

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{3 {(x + 1)}^{2}}{3} = \frac{0}{3}$

Divide ${(x + 1)}^{2}$ by $1$ .

${(x + 1)}^{2} = \frac{0}{3}$

Simplify the right side.

Divide $0$ by $3$ .

${(x + 1)}^{2} = 0$

Step 4

Set the $x + 1$ equal to $0$ .

$x + 1 = 0$

Step 5

Subtract $1$ from both sides of the equation.

$x = - 1$