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(﹣2x)3=﹣2x3 ﹣a2•a=﹣a3 (﹣x)9+(﹣x)9=﹣2x9 (﹣2a3)2=4a6
x+x2=x3 x2·x3=x6 (x3)2=x6 x9÷x3=x3
(3﹣x)(3+x) (x﹣3)(x+3) (3﹣x)2 (3+x)2
(x+2)(x-2)=x2-2 (2a+b)(-2a+b)=4a2-b2 (2x+3)(2x-3)=2x2-9 (3ab+1)(3ab-1)=9a2b2-1
(﹣2x)3=﹣2x3 ﹣a2•a=﹣a3 (﹣x)9+(﹣x)9=﹣2x9 (﹣2a3)2=4a6
9x3﹣4x2, 9x4+4, 9x3+4x, 9x4﹣4
9a3·2 a2=18 a5 2 x5·3 x4=5 x9 3 x3·4 x3=12 x3 3 y3·5 y3=15 y9
(﹣x3)2=x5 x8÷x4=x2 x3•x2=x6 (﹣3x2)2=9x4
x2+9 x2-6x+9 x2+6x+9 x2+3x+9
19a2b﹣9ab2=10ab 3x+3y=6xy 16y2﹣9y2=7 3x﹣4x+5x=4x
4x﹣9x+6x=﹣x xy﹣2xy=3xy x3﹣x2=x
x3+x=x4 x2•x3=x5 (x2)3=x5 x9÷x3=x3
(x3)4=x7 x3•x4=x12 (﹣3x)2=9x2 2x2+x2=3x4