What are the roots of x² + 18x + 81 = 0?
x² + 18x + 81 = 0 के roots क्या होंगे?
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Correct Answer
B. -9 और -9 / -9 and -9
ExplanationStep 1: This is a perfect square quadratic. Step 2: x²+18x+81 = (x+9)² so root -9 is repeated. Step 3: In perfect square quadratic roots are equal.
Step 1: यह perfect square quadratic है। Step 2: x²+18x+81 = (x+9)² इसलिए root -9 repeated है। Step 3: Perfect square quadratic में roots equal होते हैं।