问题
解答题
计算: (1)(x+2)(4x-2); (2)(-a)2•(a2)2÷a3; (3)(-
|
答案
(1)(x+2)(4x-2)
=4x2-2x+8x-4
=4x2+6x-4.
(2)(-a)2•(a2)2÷a3
=a2•a4÷a3
=a3.
(3)(-
)100×3101-(-2013)01 3
=[(-
)×3]100×3-11 3
=3-1
=2.
计算: (1)(x+2)(4x-2); (2)(-a)2•(a2)2÷a3; (3)(-
|
(1)(x+2)(4x-2)
=4x2-2x+8x-4
=4x2+6x-4.
(2)(-a)2•(a2)2÷a3
=a2•a4÷a3
=a3.
(3)(-
)100×3101-(-2013)01 3
=[(-
)×3]100×3-11 3
=3-1
=2.