(1)x²-2
=x²-(√2)²
=(x+√2)(x-√2)
(2)x²-2根号(3x)+3
=x²-2√(3x)+(√3)²
=(x-√3)²
(3)x的五次方-9x
=x(x⁴-9)
=x(x²+3)(x²-3)
=x(x²+3)(x+√3)(x-√3)
(1)x²-2
=x²-(√2)²
=(x+√2)(x-√2)
(2)x²-2根号(3x)+3
=x²-2√(3x)+(√3)²
=(x-√3)²
(3)x的五次方-9x
=x(x⁴-9)
=x(x²+3)(x²-3)
=x(x²+3)(x+√3)(x-√3)