下列计算正确的是 ( )
a 2 · a 3 = a 6
( x + y ) 2 = x 2 + y 2
( a 5 ÷ a 2 ) 2 = a 6
( - 3 xy ) 2 = 9 x y 2
a 2 + a 3 = a 5
3 2 - 2 2 = 1
( x 2 ) 3 = x 5
m 5 ÷ m 3 = m 2
下列运算正确的是 ( )
a 8 ÷ a 4 = a 2
5 a - 3 a = 2 a
( - a b 2 ) 2 = - a 2 b 4
( 2 a ) 3 = 8 a 3
a 3 ÷ a = a 3
a 3 · a 3 = a 9
a 6 ÷ a 3 = a 2
a 3 + a 3 = 2 a 6
( a 2 ) 3 = a 6
m 2 + 2 m = 3 m 3
m 4 ÷ m 2 = m 2
m 2 · m 3 = m 6
( m 2 ) 3 = m 5
)下列运算正确的是 ( )
( a 2 ) 3 = a 5
( 2 a ) 2 = 2 a 2
a 3 ÷ a 2 = a
下列各式中,计算结果为 m 6 的是 ( )
m 2 · m 3
m 3 + m 3
m 12 ÷ m 2
( m 2 ) 3
m 8 ÷ m 4 = m 2
3 m + 2 n = 5 mn
( m 3 ) 2 = m 6
( a 2 b ) 2 = a 4 b 2
计算 t 3 ÷ t 2 的结果是 ( )
t 2
t
t 3
t 5
计算 m 6 ÷ m 2 的结果是 ( )
m 3
m 4
m 8
m 12
3 + 2 = 5
x 8 ÷ x 2 = x 6
3 × 2 = 5
( a 5 ) 2 = a 7
下列运算结果正确的是 ( )
( - a ) 3 = a 3
a 9 ÷ a 3 = a 3
a + 2 a = 3 a
a · a 2 = a 2
a 2 b + 2 a b 2 = 3 a 3 b 3
a 6 · a 3 = a 9
( a 3 ) 2 = a 5