a) \(=34^2+66^2+2.34.66=\left(34+66\right)^2=100^2=10000\)
b) \(=74^2+24^2-2.24.74=\left(74-24\right)^2=2500\)
c) \(=\left(729-728\right)\left(729+728\right)=1.1457=1457\)
d) \(=\left(1001-1\right)\left(1001+1\right)=1000.1002=1002000\)
Chúc bạn học tốt.