Help please
4ˣ+2ˣ⁺²=12

( 4 ^ x ) + 2 ^ ( x + 2 ) = 12 2 ^ x = a a² + 4a - 12 = 0 D = 16 + 48 = 64 = 8²a1 = ( - 4 + 8 ) : 2 = 2 a2 = ( - 4 - 8 ) : 2 = - 6 ( < 0 ) 2 ^ x = 2 x = 1