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(﹣2a2b3)÷(﹣2ab)=a2b2 (3x2y﹣6xy)÷6xy=0.5x (21x5y2﹣9x4y3)÷3x3y2=7x2﹣3xy (3x2y+xy)÷xy=3x
x5﹣x4=x 23=6 ﹣(2x+3)=2x﹣3 ﹣x3+3x3=2x3
(﹣3x+2y)(3x+2y) (3x﹣2y)(2y﹣3x) (﹣3x+2y)(﹣3x﹣2y) (3x+2y)(3x﹣2y)
6x3+1 6x3﹣3 6x3﹣3x2 6x3+3x2
2x2,3x,5 2,﹣3,﹣5 2x2,﹣3x,﹣5 2x2﹣3x﹣5
(3x-1)(2x+5) (3x十1)(2x+5) (3x+1)(2x-5) 3x十1) (2x-5)
y=3x2+2x﹣5 y=3x2+2x﹣4 y=3x2+2x+3 y=3x2+2x+4
3x-2x=1 3x+2x=5x2 3x·2x=6x 3x-2x=x
﹣6x2﹣15x2﹣3x ﹣6x3+15x2+3x ﹣6x3+15x2 ﹣6x3+15x2﹣1
2x2-4x2=-2 3x+x=3x2 3x·x=3x2 4x6÷2x2=2x3
(x3)4=x7 x3•x4=x12 (﹣3x)2=9x2 2x2+x2=3x4