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)(x+2)(x–2)=x2-4( )x2-4+3x=(x+2)(x–2)+3x ( )x2-3x-4=(x-4)(x+1)( )x2+2x-3=(x+1)2-4
a(x-y)=ax-ay +2x+1=x(x+2)+1 (x+1)(x+3)=+4x+3 -x=x(x+1)(x-1)
a(x-y)=ax-ay +2x+1=x(x+2)+1 (x+1)(x+3)=+4x+3 -x=x(x+1)(x-1)
a(x-y)=ax-ay x2+2x+1=x(x+2)+1 (x+1)(x+3)=x2+4x+3 x3-x=x(x+1)(x-1)
a(x-y)=ax-ay x2+2x+1=x(x+2)+1 (x+1)(x+3)=x2+4x+3 x3-x=x(x+1)(x-1)
a(x﹣y)=ax﹣ay x2﹣2x+3=x(x﹣2)+3 =x2+3x﹣4 x3﹣2x2+x=x(x﹣1)2
(x+3)(x﹣3)=x2﹣9 x2﹣4+3x=(x+2)(x﹣2)+3x (x﹣1)2=x2﹣2x+1 xy2﹣x2y=xy(y﹣x)
a(x﹣y)=ax﹣ay x2+2x+1=x(x+2)+1 x3﹣x=x(x+1)(x﹣1) (x+1)(x+3)=x2+4x+3
x2-6x+9=(x-3)2 (x+3)(x-1)=x2+2x-3 x2-9+6x=(x+3)(x-3)+6x 6ab=2a·3b
a(x﹣y)=ax﹣ay x2+2x+1=x(x+2)+1 (x+1)(x+3)=x2+4x+3 x3﹣x=x(x+1)(x﹣1)