sole by completing square method 2x²+4x-16 = 0
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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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Step-by-step explanation:
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