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-3x2y·5x2y=2x2y -2x2y3·2x3y=-2x5y4 35x3y2÷5x2y=7xy (-2x-y)(2x+y)=4x2-y2
X2+2Y22XY2 2X2+Y22X2Y 3X2+Y22X3Y X2+3Y22XY3
(-a+4c)(a-4c) (x-2y)(2x+y) (-3a-1)(1-3a) (-0.5x-y)(0.5x+y)
(2x﹣3y)(2x+3y) (2x﹣3y)(﹣2x+3y) (2x﹣3y)(﹣2x﹣3y) (﹣2x+3y)(2x+3y)
X2+2Y2 2XY2 2X2+Y2 2X2Y 3X2+Y2 2X3Y X2+3Y2 2XY3
3x2y•5xy2=-2x2y -2x2y3•2xy=-2x3y4 28x4y2÷7x3y=4xy (-3a-2)(3a+2)=9a2-4
(4x-3y)(-3y-4x) (2x2-y2)(2x2+y2) (a+b-c)(-c-b+a) (-x+y)(x-y)
X2+2Y22XY2 2X2+Y22X2Y 3X2+Y22X3Y X2+3Y22XY3
x4+x4=2x8 x3•x2=x6 (x2y)3=x6y3 (x﹣y)(y﹣x)=x2﹣y2
X2+2Y2==2XY2 2X2+Y2==2X2Y 3X2+Y2==2X3Y X2+3Y2==2XY3
(x+1)(x+4)=x2+5x+4 (y+4)(y-5)=y2+9y-20 (m+2)(m-3)=m2-m-6 (x-3)(x-6)=x2-9x+18