Solve 2p

2
−7p−13=0 using the quadratic formula.

p=
2
−7+
153



,
2
7−
153





p=
2
−7+
55



,
2
−7−
55





p=
4
7+3
17



,
4
7−3
17





p=
4
7+
−55



,
4
7−
−55


1 answer

To solve the quadratic equation \(2p^2 - 7p - 13 = 0\) using the quadratic formula, we start by identifying the coefficients from the standard form of a quadratic equation, \(ap^2 + bp + c = 0\):

\[ a = 2, \quad b = -7, \quad c = -13 \]

The quadratic formula is given by:

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

We will first calculate the discriminant \(b^2 - 4ac\):

\[ b^2 = (-7)^2 = 49 \] \[ 4ac = 4 \times 2 \times (-13) = -104 \] \[ b^2 - 4ac = 49 - (-104) = 49 + 104 = 153 \]

Now substituting \(b\), \(a\), and the discriminant into the quadratic formula:

\[ p = \frac{-(-7) \pm \sqrt{153}}{2 \times 2} \]

This simplifies to:

\[ p = \frac{7 \pm \sqrt{153}}{4} \]

Thus, the solutions are:

\[ p = \frac{7 + \sqrt{153}}{4} \quad \text{and} \quad p = \frac{7 - \sqrt{153}}{4} \]

Based on the options provided, we can relate these solutions to the options:

  • Option: \(p = \frac{7 + \sqrt{153}}{4}, \frac{7 - \sqrt{153}}{4}\)

So the correct answer is:

\[ p = \frac{7 + \sqrt{153}}{4}, \quad p = \frac{7 - \sqrt{153}}{4} \]