问题 解答题

计算:

(1)x3•x5•x+(x312+4(x62=______

(2)-2(a34+a4•(a42=______

答案

(1)x3•x5•x+(x312+4(x62

=x3+5+1+x3×12+4x6×2

=x9+x36+4x12

(2)-2(a34+a4•(a42

=-2a3×4+a4•a8

=-2a12+a12

=-a12

故填x9+x36+4x12;-a12

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