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(﹣2a2b3)÷(﹣2ab)=a2b2 (3x2y﹣6xy)÷6xy=0.5x (21x5y2﹣9x4y3)÷3x3y2=7x2﹣3xy (3x2y+xy)÷xy=3x
y=3x2或y=-3x2 y=3x2 y2=-9x或y=3x2 y=-3x2或y2=9x
(﹣3x+2y)(3x+2y) (3x﹣2y)(2y﹣3x) (﹣3x+2y)(﹣3x﹣2y) (3x+2y)(3x﹣2y)
y=2x+3 y=2x﹣3 y﹣3=2x+3 y=3x﹣3
y=3x2+2x﹣5 y=3x2+2x﹣4 y=3x2+2x+3 y=3x2+2x+4
y=3(x+1)2 y=3(x﹣1)2 y=3x2+1 y=3x2﹣1
y=3x y=3x﹣2 y=3x+2x y=﹣3x﹣2
﹣(2x+y)=﹣2x+y 2(x﹣y)=2x﹣y 3x﹣(2y+z)=3x﹣2y﹣z x﹣(﹣y+z)=x﹣y﹣z
y=﹣3x+2 y=﹣3x﹣2 y=﹣3(x+2) y=﹣3(x﹣2)
y=﹣3x+2 y=﹣3x﹣2 y=﹣3(x+2) y=﹣3(x﹣2)
y=-3x或y=x y=3x或y=-x y=-3x或y=-x y=3x或y=x
y=3(x+1)2 y=3(x-1)2 y=3x2+1 y=3x2-1
5x﹣(x﹣2y)=5x﹣x+2y 2a2+(3a﹣b)=2a2+3a﹣b (x﹣2y)﹣(x2﹣y2)=x﹣2y﹣x2+y2 3x2﹣3(x+6)=3x2﹣3x﹣6