(1)计算:-3×(-2) 2 +[(-3)×2] 2 ; (2)计算: |-5 1 2 |×( ...
(1)计算:-3×(-2)2+[(-3)×2]2;(2)计算:|-512|×(13-12)×311÷114(3)5x4+3x2y-1-3x2y-6x4+2(4)3(x2y...
(1)计算:-3×(-2) 2 +[(-3)×2] 2 ; (2)计算: |-5 1 2 |×( 1 3 - 1 2 )× 3 11 ÷1 1 4 (3)5x 4 +3x 2 y-1-3x 2 y-6x 4 +2 (4)3( x 2 y+xy 2  ;)-(3x 2  ;y-1)-3xy 2
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(1)-3×(-2) 2 +[(-3)×2] 2 ; =-3×4+36 =24; (2) |-5
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(3)5x 4 +3x 2 y-1-3x 2 y-6x 4 +2 =(5-6)x 4 +(3-3)x 2 y+2-1 =1-x 4 ; (4)3( x 2 y+xy 2  ;)-(3x 2  ;y-1)-3xy 2 =3x 2 y+3xy 2  ;-3x 2  ;y+1-3xy 2 =1. |
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