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﹣2x+2y 6x+2y ﹣2x﹣8y 6x﹣8y
2x+(﹣3y+4z) 2x+(3y﹣4z) 2x+(﹣3y﹣4z) 2x+(3y+4z)
x2+6xy+9y2=(x+3y)2 2x2﹣4xy+9y2=(2x﹣3y)2 2x2﹣8y2=2(x+4y)(x﹣4y) x(x﹣y)+y(y﹣x)=(x﹣y)(x+y)
2x+(﹣3y+4z) 2x+(3y﹣4z) 2x+(﹣3y﹣4z) 2x+(3y+4z)
(2x﹣3y)(2x+3y) (2x﹣3y)(﹣2x+3y) (2x﹣3y)(﹣2x﹣3y) (﹣2x+3y)(2x+3y)
3a+2b=5ab 5y2-3y2=2 2ab-ab=ab 3x2y-5x2y=2x2y
(﹣x﹣y)(x+y) (2x﹣y)(y﹣2x) (1﹣x)(﹣1﹣x) (3x+y)(x﹣3y)
2x<3y<5z 3y<2x<5z 5z<3y<2x 5z<2x<3y
(y﹣x)(x+y) (2x﹣y)(﹣y﹣2x) (x﹣3y)(﹣3y+x) (4x﹣5y)(5y+4x)