Solve the Quadratic Equation: -5x² - 2x - 8 = 0

Question

5x22x8=0 -5x^2-2x-8=0

Solve the equation

Video Solution

Solution Steps

00:00 Find X
00:03 Pay attention to coefficients
00:10 Use the roots formula
00:23 Substitute appropriate values according to the given data and solve for X
00:51 Calculate the products and square
01:03 There's no such thing as a root of a negative number, therefore no solution
01:10 And this is the solution to the question

Step-by-Step Solution

Let's solve the quadratic equation 5x22x8=0-5x^2 - 2x - 8 = 0 using the quadratic formula:

First, identify the coefficients: a=5a = -5, b=2b = -2, and c=8c = -8.

The quadratic formula is given by:

x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

We start by calculating the discriminant, D=b24acD = b^2 - 4ac:

D=(2)24(5)(8)D = (-2)^2 - 4 \cdot (-5) \cdot (-8)

D=4160D = 4 - 160

D=156D = -156

Since the discriminant D=156D = -156 is less than zero, this indicates that there are no real solutions for the quadratic equation 5x22x8=0-5x^2 - 2x - 8 = 0.

Therefore, the equation has no solution in terms of real numbers.

Answer

No solution