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x2+x3=x5 x2•x3=x6 (x2)3=x5 x5÷x3=x2
10x2-2 10x2-x-2 10x2+4x-2 10x2-5x-2
2x+3y=5xy 3x﹣x=3 2x+3x=5x2 ﹣x2﹣x2=﹣2x2
2﹣2(2x﹣4)=﹣(x﹣7) 12﹣2(2x﹣4)=﹣x﹣7
24﹣4(2x﹣4)=﹣(x﹣7) 12﹣4x+4=﹣x+7
3x-2x=1 3x+2x=5x2 3x·2x=6x 3x-2x=x
x2+x3=x5 x2•x3=x6 (x2)3=x5 x5÷x3=x2
x=2 12x-5y+9=0 5x-12y+26=0 x=2和12x-5y-9=0
x2·x3=x6 (x2)3=x8 x2+x3=x5 x6÷x3=x3
x+x=x2 x·x=2x (x2)3=x5 x3÷x=x2
4x+5 x2-4x-5 -4x-5 x2-4x+5
只有x+2 可能是x+2或x+10或x+24 可能是x+24 可能是x+2或x+12或x+26
x2+x3=x5 x2•x3=x6 (x2)3=x5 x5÷x3=x2
x+x2=x3 2x+3x=5x (x2)3=x5 x6÷x3=x2