Solve Using the Quadratic Formula 3x^2+2x-3=0

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Algebra

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

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

Substitute the values $a = 3$ , $b = 2$ , and $c = - 3$ into the quadratic formula and solve for $x$ .

$\frac{- 2 \pm \sqrt{2^{2} - 4 \cdot (3 \cdot - 3)}}{2 \cdot 3}$

Simplify.

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Simplify the numerator.

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Raise $2$ to the power of $2$ .

$x = \frac{- 2 \pm \sqrt{4 - 4 \cdot 3 \cdot - 3}}{2 \cdot 3}$

Multiply $- 4$ by $3$ .

$x = \frac{- 2 \pm \sqrt{4 - 12 \cdot - 3}}{2 \cdot 3}$

Multiply $- 12$ by $- 3$ .

$x = \frac{- 2 \pm \sqrt{4 + 36}}{2 \cdot 3}$

Add $4$ and $36$ .

$x = \frac{- 2 \pm \sqrt{40}}{2 \cdot 3}$

Rewrite $40$ as $2^{2} \cdot 10$ .

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Factor $4$ out of $40$ .

$x = \frac{- 2 \pm \sqrt{4 (10)}}{2 \cdot 3}$

Rewrite $4$ as $2^{2}$ .

$x = \frac{- 2 \pm \sqrt{2^{2} \cdot 10}}{2 \cdot 3}$

Pull terms out from under the radical.

$x = \frac{- 2 \pm 2 \sqrt{10}}{2 \cdot 3}$

Multiply $2$ by $3$ .

$x = \frac{- 2 \pm 2 \sqrt{10}}{6}$

Simplify $\frac{- 2 \pm 2 \sqrt{10}}{6}$ .

$x = \frac{- 1 \pm \sqrt{10}}{3}$

The result can be shown in multiple forms.

Exact Form:

$x = \frac{- 1 \pm \sqrt{10}}{3}$

Decimal Form:

$x = 0.72075922 \dots, - 1.38742588 \dots$

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