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计算 a 3 · a 2 正确的是 ( )
a
a 5
a 6
a 9
下列计算正确的是 ( )
a 2 · a = a 2
a 6 ÷ a 2 = a 3
a 2 b - 2 b a 2 = - a 2 b
( - 3 2 a ) 3 = - 9 8 a 3
a 2 + a 3 = a 5
a 2 · a 3 = a 6
a 3 ÷ a 2 = a
( a 2 ) 3 = a 5
m 2 · m 4 = m 8
( - 2 mn ) 2 = 4 m 2 n 2
( m 2 ) 3 = m 5
3 m 3 n 2 ÷ m 2 n 2 = 3 mn
b 3 · b 3 = 2 b 3
( a + b ) 2 = a 2 + b 2
( a 5 ) 2 = a 10
a - ( b + c ) = a - b + c
计算的结果等于 .
下列运算正确的是 ( )
2 a + 3 a = 5 a 2
( a + 2 b ) 2 = a 2 + 4 b 2
( - a b 2 ) 3 = - a 3 b 6
a 2 · a 2 = 2 a 4
( - a 2 ) 3 = - a 6
3 a 2 - 6 a 2 = 3 a 2
( a - 2 ) 2 = a 2 - 4
( - x 2 ) 3 = - x 5
x 2 + x 3 = x 5
x 3 · x 4 = x 7
2 x 3 - x 3 = 1
x 2 + x 4 = x 6
( - x 3 ) 3 = x 6
x 2 · x 3 = x 6
2 x 2 y - 2 y x 2 = 0
下列计算结果为 a 6 的是 ( )
a 2 · a 3
a 12 ÷ a 2
( a 2 ) 3
( - a 2 ) 3
计算: .
( a 2 ) 3 = a 6
( ab ) 2 = a b 2
若,则的值为 .
计算 a 3 · ( - a ) 的结果是 ( )
a 2
- a 2
a 4
- a 4
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