下列各式中,正确的是 ( )
x + 2 x = 3 x 2
− ( x − y ) = − x − y
( x 2 ) 3 = x 5
x 5 ÷ x 3 = x 2
已知2a=m,32b=n,a,b为正整数,求23a+10b的值.
下列运算正确的是 ( )
a - 2 = - a 2
a 2 + a 3 = a 5
a 2 ⋅ a 3 = a 6
( a 2 ) 3 = a 6
化简(﹣2)2015+22016,结果为()
下列运算中,正确的是( )
a 2 • a 5 = a 10
( a ﹣ b ) 2 = a 2 ﹣ b 2
(﹣ 3 a 3 ) 2 = 6 a 6
﹣ 3 a 2 b + 2 a 2 b =﹣ a 2 b
如果|a+3|+(b﹣2)2=0,那么代数式(a+b)2016的值为()
( - x 3 ) 2 = x 5
( - x ) 2 = x
( - x ) 2 + x = x 3
( - 1 + x ) 2 = x 2 - 2 x + 1
计算: (1) (2)
下列运算结果正确的是 ( )
x 2 + x 3 = x 5
( − a − b ) 2 = a 2 + 2 ab + b 2
( 3 x 3 ) 2 = 6 x 6
2 + 3 = 5
下列运算中,正确的是 ( )
a 2 + a = a 3
( - ab ) 2 = - a b 2
a 5 ÷ a 2 = a 3
a 5 ⋅ a 2 = a 10
2 x 2 + 3 x 2 = 5 x 2
x 2 ⋅ x 4 = x 8
x 6 ÷ x 2 = x 3
( x y 2 ) 2 = x y 4
( x 2 ) 3 = x 6
3 x 2 - 2 x = x
( - 2 x ) 3 = - 6 x 3
2 x 2 + 3 x 3 = 5 x 5
( − 2 x ) 3 = − 6 x 3
( x + y ) 2 = x 2 + y 2
( 3 x + 2 ) ( 2 − 3 x ) = 4 − 9 x 2
x 3 + x 3 = x 6
2 x 3 - x 3 = x 3
( x 3 ) 2 = x 5
x 3 ⋅ x 3 = x 9
计算: (1)(﹣4)﹣(﹣1)+(﹣6)÷2. (2)27÷(﹣3)2﹣(﹣)×(﹣8)