计算:(1)a 2 ?a 5 +a?a 3 ?a 3 (2)-(-x 2 ) 3 ?(-x 2 ) 2 -x?(-x 3 ) 3 (3)(2x-1)(2x+1
计算:(1)a2?a5+a?a3?a3(2)-(-x2)3?(-x2)2-x?(-x3)3(3)(2x-1)(2x+1)(x2+x+1)(4)(3x-2y+1)(3x+2...
计算:(1)a 2 ?a 5 +a?a 3 ?a 3 (2)-(-x 2 ) 3 ?(-x 2 ) 2 -x?(-x 3 ) 3 (3)(2x-1)(2x+1)(x 2 +x+1)(4)(3x-2y+1)(3x+2y-1)
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(1)a 2 ?a 5 +a?a 3 ?a 3 , =a 7 +a 7 , =2a 7 ; (2)-(-x 2 ) 3 ?(-x 2 ) 2 -x?(-x 3 ) 3 , =x 10 +x 10 , =2x 10 ; (3)(2x-1)(2x+1)(x 2 +x+1), =(4x 2 -1)(x 2 +x+1), =4x 4 +4x 3 +3x 2 -x-1; (4)(3x-2y+1)(3x+2y-1), =[3x-(2y-1)][3x+(2y-1)], =9x 2 -4y 2 +4y-1. |
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