Bai 1: Rut gon bieu thuc
a, ( m+n )2 - ( m-n )2 + ( m+n ) ( m-n)
b, ( a+b)3 + ( a-b )3 - 2a3
c, ( 2x+1)2 + 2(4x2 - 1) + ( 2x-1 )2
d, ( a+b+c )2 - 2(a+b+c) (b+c ) + ( b+c )2
Loga
Toán lớp 8
Bai 1: Rut gon bieu thuc
a, ( m+n )2 - ( m-n )2 + ( m+n ) ( m-n)
b, ( a+b)3 + ( a-b )3 - 2a3
c, ( 2x+1)2 + 2(4x2 - 1) + ( 2x-1 )2
d, ( a+b+c )2 - 2(a+b+c) (b+c ) + ( b+c )2
