Question

Fill in the blank: ax² + bx + c = 0 ; a ≠ 0 has two equal and real roots, when __________.

1️⃣ b² - 4ac = 0
2️⃣ b² - 4ac < 0
3️⃣ b² - 4ac>0
4️⃣ none of these​

Answer 1

none of these

Step-by-step explanation:

none of these