Trả lời
\(\left(x+y\right)^2+\left(x+y\right)^2\)
\(=x^2+2xy+y^2+x^2+2xy+y^2\)
\(=2x^2+4xy+2y^2\)
\(=2.\left(x+y\right)^2\)
Study well
\(\left(x+y\right)^2+\left(x+y\right)^2=2\left(x+y\right)^2\)giống như \(a^2+a^2=2a^2\)thôi bạn nhé
\(( x + y )^2 + ( x + y )^2\)
\(= x^2 + 2xy + y^2 + x^2 + 2xy + y^2\)
\(= 2x^2 + 4xy + 2y^2\)
\(= 2.( x + y )^2\)
Trả lời :
\(\left(x+y\right)^2+\left(x+y\right)^2\)
\(=2\left(x+y\right)^2\)
Trả lời :
\(\left(x+y\right)^2+\left(x+y\right)^2\)
\(=x^2+y^2+x^2+y^2\)
\(=2x^2+4xy+2y^2\)
\(=2\left(x+y\right)^2\)
Bài làm
( x + y )2 + ( x + y ) 2
= x2 + 2xy + y2 + x2 + 2xy + y2
= 2x2 + 4xy +2y2
= 2.( x + y )2
# Học tốt #
