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a3+a3=a6 (3x)2=6x2 (x+y) 2= x2+y2 (-x-y)(y-x)=x2-y2
8x2﹣8y2 8y2﹣8x2 8(x+y)2 8(x﹣y)2
3a+2b=5ab 5y﹣3y=2 3x2y﹣2yx2=x2y ﹣3x+5x=﹣8x
(﹣3x+2y)(3x+2y) (3x﹣2y)(2y﹣3x) (﹣3x+2y)(﹣3x﹣2y) (3x+2y)(3x﹣2y)
-3x2y·5x2y=2x2y -2x2y3·2x3y=-2x5y4 35x3y2÷5x2y=7xy (-2x-y)(2x+y)=4x2-y2
2x+3y=5xy (﹣2x2)3=﹣6x6 3y2•(﹣y)=﹣3y2 6y2÷2y=3y
(2x﹣3y)(2x+3y) (2x﹣3y)(﹣2x+3y) (2x﹣3y)(﹣2x﹣3y) (﹣2x+3y)(2x+3y)
x2-3y2 x2-6y2 x2-9y2 2x2-6y2