Determine the zero(s) of the quadratic function y=6x2+13x+5 . Show all steps.(2 points)

1 answer

To find the zeros of the quadratic function \( y = 6x^2 + 13x + 5 \), we need to solve the equation \( 6x^2 + 13x + 5 = 0 \). We can do this using the quadratic formula:

\[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \]

where \( a = 6 \), \( b = 13 \), and \( c = 5 \).

Step 1: Calculate the discriminant

First, we calculate the discriminant \( D = b^2 - 4ac \):

\[ D = 13^2 - 4(6)(5) \] \[ D = 169 - 120 \] \[ D = 49 \]

Step 2: Apply the quadratic formula

Now, we can apply the values into the quadratic formula:

\[ x = \frac{-13 \pm \sqrt{49}}{2(6)} \]

Step 3: Simplify the square root

Since \( \sqrt{49} = 7 \), we can substitute this into the formula:

\[ x = \frac{-13 \pm 7}{12} \]

Step 4: Calculate the two possible values of \( x \)

Now we will calculate the two possible solutions:

  1. First solution: \[ x_1 = \frac{-13 + 7}{12} = \frac{-6}{12} = -\frac{1}{2} \]

  2. Second solution: \[ x_2 = \frac{-13 - 7}{12} = \frac{-20}{12} = -\frac{5}{3} \]

Conclusion

The zeros of the quadratic function \( y = 6x^2 + 13x + 5 \) are:

\[ x = -\frac{1}{2} \quad \text{and} \quad x = -\frac{5}{3} \]