Question

把（x+10）²-6（x+1）+9分解因式,

Answer 1

毕竟 0 和 ) 是同一个键,

这个我也经常按错键要修改,

题目就应该是

( x + 1 )" - 6( x + 1 ) + 9

= ( x + 1 )" - 2( 3 )( x + 1 ) + 3"

= ( x + 1 - 3 )"

= ( x - 2 )"

这也是完全平方式啊,或者

= ( x + 1 )" - 3( x + 1 ) - 3( x + 1 ) + 9

= ( x + 1 )( x + 1 - 3 ) - 3( x + 1 - 3 )

= ( x + 1 - 3 )"

= ( x - 2 )"

还可以

= x" + 2x + 1 - 6x - 6 + 9

= x" - 4x + 4

= ( x - 2 )"