Giải phương trình ( Có tìm điều kiện xác định )
a)square root of x squared minus x end root equals square root of 3 minus x end root
b) square root of left parenthesis x minus 3 right parenthesis squared end root equals 3 minus x
c) square root of x minus 2 end root plus square root of 9 x minus 18 end root plus square root of 25 x minus 50 end root equals 18
d) square root of left parenthesis 2 x minus 5 right parenthesis squared end root minus 3 x equals 5