Question

What is x2 + 2x + 9 = 0

Answer 1

x has no real solution

Explanation:

Our equation is qudratic equation so the method we will follow to solve it is using the dicriminant :

• Let Δ be the dicriminant
• a=1
• b=2
• c=9
• Δ= 2²-4*1*9 =4-36=-32
• we notice that Δ≤0⇒x has no real solution