(6x+1)^2+(6x-1)^2-2(1+6x)*(6x-1)
=(6x+1)2-2(6x+1)(6x-1)+(6x-1)2
=[(6x+1)-(6x-1)]2
=(6x+1-6x+1)2
=22
=4
\(\left(6x+1\right)^2+\left(6x-1\right)^2-2\left(1+6x\right)\left(6x-1\right)\)
\(\Rightarrow\left(6x+1\right)^2-2\left(6x+1\right)\left(6x-1\right)+\left(6x-1\right)^2\)
\(\Rightarrow\left(6x+1-6x+1\right)^2\)
\(\Rightarrow2^2\)
\(\Rightarrow4\)
Trả lời:
( 6x + 1 )2 + ( 6x - 1 )2 - 2 ( 1 + 6x ) ( 6x - 1 )
= ( 6x + 1 )2 - 2 ( 6x + 1 ) ( 6x - 1 ) + ( 6x - 1 )2
= [ ( 6x + 1 ) - ( 6x - 1 ) ]2
= ( 6x + 1 - 6x + 1 )2
= 22
= 4
Trả lời:
( 6x + 1 )2 + ( 6x - 1 )2 - 2 ( 1 + 6x ) ( 6x - 1 )
= ( 6x + 1 )2 - 2 ( 6x + 1 ) ( 6x - 1 ) + ( 6x - 1 )2
= [ ( 6x + 1 ) - ( 6x - 1 ) ]2
= ( 6x + 1 - 6x + 1 )2
= 22
= 4
