Question

The root of the equation √(2x2 +9) are​

Answer 1

Step-by-step explanation:

$\sqrt{( {2x}^{2} + 9)} = 9$

• √2x² + √9 = 9
• √2x² + 3 = 9
• √2x = 9 - 3
• √2x = 6
• 2x = (6)²
• 2x = 36
• x = 36 / 2
• x = 18
• OR
• x = (3√2)²
• x = 9 × 2
• x = 18

:. The root of the equation is x = 3√2 , -3√2