\(136^2+16^2-20^2-32\cdot136\\ =\left(136^2-32\cdot136+16^2\right)-20^2\\ =\left(136-16\right)^2-20^2=120^2-20^2\\ =\left(120-20\right)\left(120+20\right)\\ =100\cdot140=14000\)
Tick plz
Ta có: \(B=136^2-32\cdot136+16^2-20^2\)
\(=120^2-20^2\)
\(=100\cdot140=14000\)