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5x3+2x 6x3+1 6x3+2x 6x2+2x
x5﹣x4=x 23=6 ﹣(2x+3)=2x﹣3 ﹣x3+3x3=2x3
(﹣2x2)3=﹣6x6 x2•x3=x6 6x4÷3x3=2x x2+x3=2x5
3x2﹣5x2=﹣2x 6x2+2x2=3x2 x2+x2=2x2 ﹣2(x﹣2)=﹣2x﹣4
(2x﹣3y)(2x+3y) (2x﹣3y)(﹣2x+3y) (2x﹣3y)(﹣2x﹣3y) (﹣2x+3y)(2x+3y)
3x2-2x2=1 x+x=x2 4x8÷2x2=2x4 x·x=x2
x2•x3=x6 x5+x5=2x10 (﹣2x)3=8x3 (﹣2x3)÷(﹣6x2)=x
5x3+2x 6x3+1 6x3+2x 6x2+2x
x2+x2=x4 x2+x3=2x5 3x﹣2x=1 x2y﹣2x2y=﹣x2y
2x2-4x2=-2 3x+x=3x2 3x·x=3x2 4x6÷2x2=2x3