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下列计算正确的是 ( )
a 3 ⋅ a 2 = a 6
a 2 + a 2 = a 4
( a 3 ) 2 = a 5
a 3 a 2 = a ( a ≠ 0 )
下列运算正确的是 ( )
x 3 + x 3 = x 6
2 x 3 - x 3 = x 3
( x 3 ) 2 = x 5
x 3 ⋅ x 3 = x 9
a 3 ÷ a 3 = a 6
a 3 ⋅ a 3 = a 6
( a 3 ) 3 = a 6
( a b 3 ) 2 = a b 6
计算 ( - a 2 ) 3 的结果是 ( )
- a 6
a 6
- a 5
a 5
a - 2 = - a 2
a 2 + a 3 = a 5
a 2 ⋅ a 3 = a 6
( a 2 ) 3 = a 6
a 3 ⋅ a 3 = 2 a 3
( - 2 a ) 2 = 4 a 2
( a + b ) 2 = a 2 + b 2
( a + 2 ) ( a - 2 ) = a 2 - 2
( - x 3 ) 2 = x 5
( - x ) 2 = x
( - x ) 2 + x = x 3
( - 1 + x ) 2 = x 2 - 2 x + 1
计算 ( - 5 x 3 y ) 2 正确的是 ( )
25 x 5 y 2
25 x 6 y 2
- 5 x 3 y 2
- 10 x 6 y 2
7 a 3 - 3 a 2 = 4 a
( a 2 ) 3 = a 5
a 6 ÷ a 3 = a 2
- a ( - a + 1 ) = a 2 - a
a 2 ⋅ a = a 3
5 a - 4 a = 1
( 2 a ) 3 = 6 a 3
( a 5 ) 2 = a 7
x 4 ⋅ x 4 = x 8
9 = ± 3
- 27 3 - 3 = 2 3
下列运算中,计算正确的是 ( )
m 2 + m 3 = 2 m 5
( - 2 a 2 ) 3 = - 6 a 6
( a - b ) 2 = a 2 - b 2
6 ÷ 2 = 3
( - a ) 2 = - a 2
2 a 2 - a 2 = 2
( a - 1 ) 2 = a 2 - 1
a 3 + a 3 = a 6
2 a 3 - a 3 = 1
a 2 ⋅ a 3 = a 5
a 5 + a 5 = a 10
- 3 ( a - b ) = - 3 a - 3 b
( ab ) - 3 = a b - 3
a 6 ÷ a 2 = a 4
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