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a(x+y)=ax+ay x2﹣4x+4=x(x﹣4)+4 10x2﹣5x=5x(2x﹣1) x2﹣16+3x=(x﹣4)(x+4)+3x
(x+1)(x﹣1)=x2﹣1 x2﹣4x+4=x(x﹣4)+4 (x+3)(x﹣4)=x2﹣x﹣12 x4﹣16=(x2+4)(x+2)(x﹣2)
a (x + y) =a x + a y x2-4x+4=x(x-4)+4 10x2-5x=5x(2x-1) x2-16+3x=(x-4)(x+4)+3x
x(x+4)2 x(x-4)2 x3-4x(2x-4) x2(x-8)+16x
x2﹣9+6x=(x+3)(x﹣3)+6x (x+5)(x﹣2)=x2+3x﹣10 x2﹣8x+16=(x﹣4)2 6ab=2a•3b
a(x+y)=ax+ay; x2-4x+4=x(x-4)+4; 10x2-5x=5x(2x-1); x2-16+3x=(x+4)(x-4)+3x
(4﹣x)(4+x) (x﹣4)(x+4) (8+x)(8﹣x) (4﹣x)2