(3√18+0.2√50-4√0.5)÷√32
= (9√2+0.2*5√2-2√2)÷4√2
= 2
(√10-3)的2009次方×(3+√10)的2010次方
=【(√10-3)×(3+√10)】的2009次方 ×(3+√10)
= 3+√10
a的平方-5ab+b的平方+5
= (a -b)^2 -3ab +5
= 4 - 3 +5
= 6
(3√18+0.2√50-4√0.5)÷√32
= (9√2+0.2*5√2-2√2)÷4√2
= 2
(√10-3)的2009次方×(3+√10)的2010次方
=【(√10-3)×(3+√10)】的2009次方 ×(3+√10)
= 3+√10
a的平方-5ab+b的平方+5
= (a -b)^2 -3ab +5
= 4 - 3 +5
= 6