Which of the following are the roots of the quadratic equation x2 + 2�

1.	Which of the following are the roots of the quadratic equation x2 + 2√2x - 6 = 0 ? (1) −3√2, √2 (2) 3√2, - 2√2 (3) 3, 2 (4) 3, 2√2
Answer» Correct option is (1) −3√2, √2 x² + 2√x - 6 = 0 ⇒ x² + 3√2x - √2x - 6 = 0 ⇒ (x - √2) (x + 3√2) = 0 x = √2 , -3√2

Which of the following are the roots of the quadratic equation x2 + 2√2x - 6 = 0 ? (1) −3√2, √2 (2) 3√2, - 2√2 (3) 3, 2 (4) 3, 2√2

Answer»

Correct option is (1) −3√2, √2

x² + 2√x - 6 = 0

⇒ x² + 3√2x - √2x - 6 = 0

⇒ (x - √2) (x + 3√2) = 0

x = √2 , -3√2

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Which of the following are the roots of the quadratic equation x2 + 2√2x - 6 = 0 ? (1) −3√2, √2 (2) 3√2, - 2√2 (3) 3, 2 (4) 3, 2√2

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