\(D=2\left(a+2b\right)+5a+3b\)
\(\Rightarrow D=2a+4b+5a+3b\)
\(\Rightarrow D=7a+7b\)
\(\Rightarrow D=7\left(a+b\right)\)
Chúc em học tốt nhé!
Trả lời :
\(D=2\left(a+2b\right)+5a+3b\)
\(D=2a+4b+5a+3b\)
\(D=7a+7b\)
\(D=7\left(a+b\right)\)
\(D=2\left(a+2b\right)+5a+3b\)
\(D=2a+4b+5a+3b\)
\(D=7a+7b\)
\(D=7\left(a+b\right)\)