Question

Write in Roster form :- C { x : x² + x – 12 = 0 x E N​

Answer 1

Answer

{x:x∈R and x2  +x−12=0}

hope this helps!

mark me brainliest

Answer 2

Answer:

C = {-4, 3}

Step-by-step explanation:

We will use quadratic formula for finding the roots.

x² + x - 12 = 0

x = [-1 ± √(1² - 4(1)(12))] / 2

x = (-1 ± √49) / 2

x = (-1 ± 7) / 2

so, x = (-1 + 7) / 2 and x = (-1 - 7) / 2

x = 3 and x = -4

Roaster form, C = {-4, 3}