Question

Giải giúp mình nhé

Answer 1

a: \(=\left(63-13\right)^2=50^2=2500\)

b: \(=\dfrac{\left(57-18\right)\left(57+18\right)}{\left(76.5-1.5\right)\left(76.5+1.5\right)}=\dfrac{39}{78}=\dfrac{1}{2}\)

c: \(=328^2+2\cdot328\cdot172+172^2\)

\(=\left(328+172\right)^2=500^2=250000\)

d: \(=93^2-2\cdot93\cdot79+79^2\)

\(=\left(93-79\right)^2=14^2=196\)