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x﹣2x=x x6÷x3=x2 (﹣x2)3=﹣x6 (x+y)2=x2+y2
(﹣2x2)3=﹣6x6 x2•x3=x6 6x4÷3x3=2x x2+x3=2x5
6a-5a=1 5x-6x=11x m2-m=m x3+6x3=7x3
154+20)x5%=8.7(万元) 154+20+25-120)x5%=3.95(万元) 154x5%=7.7(万元) 154+20+25)x5%=9.95(万元)
x2+x3=x5 x2•x3=x6 (x2)3=x6 x6÷x3=x2
3x+3y=6xy 7x﹣5x=2 ﹣y﹣y=﹣2y ﹣2a+3a=﹣5a
x+x2=x3 x2•x3=x6 (x3)2=x6 x6÷x3=x2
3x-2x=1 3x+2x=5x2 3x·2x=6x 3x-2x=x
(x+2)(x-6) (x-2)(x+6) (x+3)(x-4) (x-3)(x+4)
x2+x4=x 6 2x +3y=5xy (x 3)2=x 6 x 6÷x 3=x 2
x2·x3=x6 (x2)3=x8 x2+x3=x5 x6÷x3=x3
相关系数为0.8452 相关系数为0.7245 相关系数为-0.8452 y对x的回归系数为0.9861 y对x的回归系数为0.7245
(x-6)(x+1) (x+6)(x-1) (x-2)(x+3) (x+2)(x-3)
﹣2x+3x=x 6xy2÷2xy=3y (﹣2x2y)3=﹣6x6y3 2xy2•(﹣x)=﹣2x2y2
x2•x3=x5 x6+x6=x12 (x2)3=x5 x﹣1=x