Tìm x biết
tìm X biết
a) 4^x + 2^2x+1 = 32 e) ( -120 ) : 15 + 12 . ( 2 . x - 1 ) = 52
b) 4 - x = -27 - ( -15 ) g) 11 + 5 . ( x - 1 )^2 = 56
c) 20 - 5 . ( 2- x ) = 45 h) ( x^2 - 4 ).( 2.x + 10 ) = 0
d) 2( x + 3 ) - 48 : 2^3 = 2
a) 4^x + 2^2x+1 = 32 e) ( -120 ) : 15 + 12 . ( 2 . x - 1 ) = 52
b) 4 - x = -27 - ( -15 ) g) 11 + 5 . ( x - 1 )^2 = 56
c) 20 - 5 . ( 2- x ) = 45 h) ( x^2 - 4 ).( 2.x + 10 ) = 0
d) 2( x + 3 ) - 48 : 2^3 = 2