简便计算:2乘以56的平方+8乘以56乘以22+2乘以(44的平方)
问题描述:
简便计算:2乘以56的平方+8乘以56乘以22+2乘以(44的平方)
答
2乘以56的平方+8乘以56乘以22+2乘以(44的平方)
2×56^2+8×56×22+2×44^2
=2×56^2+4×56×44+2×44^2
=2×(56^2+2×56×44+44^2)
=2×(56+44)^2
=2×100^2
=20000