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Sole by completing square method 2x²+4x-16 = 0 |
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Answer» Step-by-step explanation: 2x² + 4X = 16 divide both sides by 2 to bring coefficient of x² as 1 => x² + 2x = 8 add both sides with SQUARE of half the coefficient of x ( 2/2 = 1) => x² + 2x + 1² = 8 + 1² => x² + 2x + 1 = 9 => (x + 1)² = 9 => x + 1 = ± 3 => x + 1 = 3 => x = 2 .........1 => x + 1 = - 3 => x = - 4......2 |
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