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5x3+2x 6x3+1 6x3+2x 6x2+2x
从2+x=5可得到x=5﹣2 从3x=2x﹣1可得到3x﹣2x=﹣1
从5x=4x+1可得到4x﹣5x=1 从6x﹣2x=﹣3可得到6x=2x﹣3
(﹣2x2)3=﹣6x6 x2•x3=x6 6x4÷3x3=2x x2+x3=2x5
6x2+3x=9x3 6x2÷3x=2x (﹣6x2)3=36x6 6x2•3x=18x2
3x2﹣6x﹣1 5x2﹣1 3x2+2x﹣1 3x2+6x﹣1
5x2+3x=8x3 6x2•3x=18x2 (﹣6x2)3=﹣36x6 6x2÷3x=2x
减去多项式2x2+5x﹣3,某同学将减号抄成了加号,运算结果为﹣x2+3x﹣5,那么正确的运算结果是( ) A.﹣3x2﹣2x﹣4 ﹣x2+3x﹣7 ﹣5x2﹣7x+1 无法确定
﹣6x2﹣15x2﹣3x ﹣6x3+15x2+3x ﹣6x3+15x2 ﹣6x3+15x2﹣1
6x2+3x=9x3 6x2·3x=18x2 (-6x2)3=36x6 6x2÷3x=2x
5x3+2x 6x3+1 6x3+2x 6x2+2x
(-2x3y2)3=-6x9y6 -3x2·x3=-3x6 (-x3)2=-x6 x10÷x6=x4
a6÷a2=a3 (-2)-1=2 (-3x2)·2x3=-6x6 (π-3)0=1