Question

1. Find the roots of x + 4x + 5 = 0 using quadratic formula.​

Answer 1

there will be no real root for the following equation

use the formula -b +- √b^2 - 4ac / 2à

Answer 2

Answer:

Roots are : - 2 - 1i and - 2 + 1i

Step-by-step explanation:

Q: Find the roots of x² + 4x + 5 = 0 using quadratic formula.

We have,

a = 1, b = 4 & c = 5

By using quadratic formula :

Roots = {- b ±√(b² - 4ac)}/{2a}

= {- 4 ±√(4² - 4 × 1 × 5)}/{2 × 1}

= {- 4 ±√(16 - 20)}/{2}

= {- 4 ±√(-4)}/{2}

= {- 4 ±√(4i²)}/{2}

= {- 4 ± 2i}/{2}

= 2 {- 2 ± 1i}/{2}

= - 2 ± 1i

#shivam