cho a=4+\(\sqrt{5}\) va b=4-\(\sqrt{5}\) tinh gia tri cua bieu thuc

A=\(\left(a^{2019}-8a^{2018}+11a^{2017}\right)\)+\(\left(b^{2019}-8b^{2018}+11b^{2017}\right)\)

1, cho a = \(4+\sqrt{5}\),b=\(4-\sqrt{5}\)

Tính A=\(\left(a^{2018}-8a^{2017}+11a^{2016}\right)+\left(b^{2018}-8b^{2017}+11b^{2016}\right)\)

2, cho \(\sqrt{x^2-6x+36}+\sqrt{x^2-6x+48}=18\)

Tính  A=\(\sqrt{4x^2-24x+256}-2\sqrt{x^2-6x+36}\)

1)Tính:

a)\(\sqrt{13a}.\sqrt{\frac{52}{a}}\left(a< 0\right)\)

b)\(\left(2+\sqrt{5}\right).\left(2-\sqrt{5}\right)\)

c)\(\sqrt{b^4\left(a-b\right)^2}.\frac{1}{a-b}\left(a< 0\right)\)

d)\(\left(\sqrt{2019}-\sqrt{2018}\right).\left(\sqrt{2018}+\sqrt{2019}\right)\)

Giúp mk vs mấy bn, mk đang cần gấp

1) Cho bieu thuc: \(B=\left(\frac{\sqrt{x}}{\sqrt{x}+4}+\frac{4}{\sqrt{x}-4}\right):\frac{x+16}{\sqrt{x}+2}\left(x\ge0,x\ne16\right)\)

a) Cho bieu thuc A= \(\frac{\sqrt{x}+4}{\sqrt{x}+2}\) ; voi cac cua bieu thuc A va B da cho, hay tim cac gia tri cua x nguyen de gia tri cua bieu thuc B(A;-1) la so nguyen

Cho \(xy+\sqrt{\left(1+x\right)^2\left(1+y\right)^2}=\sqrt{2017}\)

Tinh gia tri cua bieu thuc: \(P=x+\sqrt{1+y^2}+y\sqrt{1+x^2}\)

Giup mk!!!

Tính:

A) \(\left(\sqrt{3}-2\right)^2\left(\sqrt{3}-2\right)^2\)

B) \(\left(11-4\sqrt{3}\right)\left(11-4\sqrt{3}\right)\)

C) \(\left(1+\sqrt{2018}\right)\left(\sqrt{2019}-2\sqrt{2018}\right)\)

D)

\(\left(\sqrt{2}-1\right)^2+\frac{3}{2}\sqrt{\left(-2\right)}+\frac{4\sqrt{2}}{5}+\sqrt{1\frac{11}{25}}.2\)

Thực hiện phép tính

a)\(\sqrt{1+\left(\dfrac{1}{2017}+\dfrac{1}{2019}\right)^2}\)

b)\(\sqrt{2017^2+2017^2.2018^2+2018^2}\)