Question

Tính giá trị của biểu thức

a. A=\(\sqrt{64}\)+\(4\sqrt{4}\)+ 2016 

b B=\(2\sqrt{8}\)-\(3\sqrt{18}\)+\(4\sqrt{128}\)-\(5\sqrt{32}\)

Answer 1

a) \(A=\sqrt{64}+4\sqrt{4}+2016=\sqrt{8^2}+4.\sqrt{2^2}+2016=8+4.2+2016=2032\)

b) \(B=2\sqrt{8}-3\sqrt{18}+4\sqrt{128}-5\sqrt{32}=4\sqrt{2}-9\sqrt{2}+32\sqrt{2}-20\sqrt{2}\)

\(=\sqrt{2}\left(4-9+32-20\right)=7\sqrt{2}\)

Answer 2

a,

\(A=\sqrt{8}^2+2.\sqrt{8}.\sqrt{2}+\sqrt{2}^2+2014\)

\(=\left(\sqrt{8}+\sqrt{2}\right)^2+2014\)

Answer 3

Trên đó 2016 mà b

Answer 4

a) A=\(8+4\cdot2+2016=8+8+2016=2032\)

b) B=\(4\sqrt{2}-9\sqrt{2}+32\sqrt{2}-20\sqrt{2}=\left(4-9+32-20\right)\sqrt{2}=7\sqrt{2}\)