To solve the quadratic equation \( x^2 + 3x - 5 = 0 \), we can use the quadratic formula:
\[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \]
In this equation, \( a \), \( b \), and \( c \) are the coefficients from \( ax^2 + bx + c = 0 \). Here, we have:
- \( a = 1 \)
- \( b = 3 \)
- \( c = -5 \)
Step 1: Calculate the Discriminant
First, we need to calculate the discriminant \( b^2 - 4ac \):
\[ b^2 - 4ac = 3^2 - 4 \cdot 1 \cdot (-5) \]
Calculating \( 3^2 \):
\[ 3^2 = 9 \]
Now calculate \( -4 \cdot 1 \cdot (-5) \):
\[ -4 \cdot 1 \cdot (-5) = 20 \]
Now combine these values:
\[ b^2 - 4ac = 9 + 20 = 29 \]
Step 2: Apply the Quadratic Formula
Now we can substitute \( a \), \( b \), and the discriminant into the quadratic formula:
\[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} = \frac{-3 \pm \sqrt{29}}{2 \cdot 1} \]
This simplifies to:
\[ x = \frac{-3 \pm \sqrt{29}}{2} \]
Final Steps: Write the Solutions
Thus, the solutions to the quadratic equation \( x^2 + 3x - 5 = 0 \) are:
\[ x = \frac{-3 + \sqrt{29}}{2} \quad \text{and} \quad x = \frac{-3 - \sqrt{29}}{2} \]
These are the exact solutions. You can further evaluate them numerically if needed, but they represent the exact values of \( x \).