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प्रश्न
Solve: (2x+3)2 = 81
बेरीज
उत्तर
(2x+3)2 = 81
`=> 2x - 3 = +-9`
=> 2x + 3 = 9 and 2x + 3 = -9
=> 2x + 3 = 9 and 2x = -12
=> x = 3 and x = -6
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