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Verified answer
2^x²-3x-4 = 4^x+12^x²-3x-4 = (2²)^x+1
=> x² - 3x - 4 = 2 ( x + 1 )
=> x² - 3x - 4 = 2x + 2
=> x² - 3x - 2x - 4 - 2 = 0
=> x² - 5x - 6 = 0
=> ( x - 6 )( x + 1 ) = 0
x = 6 atau x = - 1
hp = ( - 1 ,6 )