x” - 5x + 6= x” - 2x - 3x + 6= x( x - 2 ) - 3( x - 2 )= ( x - 2 )( x - 3 )或者= x” - 3x - 2x + 6= x( x - 3 ) - 2( x - 3 )= ( x - 2 )( x - 3 )
我写给你计算过程:x²-5x+6=x²-2x-3x+6=(x²-2x)-(3x-6)=x(x-2)-3(x-2)=(x-3)(x-2)
(x-2)(x-3)