1.Chứng minh:\(\dfrac{a+\sqrt{2+\sqrt{5}.}\sqrt{\sqrt{9-4\sqrt{5}}}}{3\sqrt{2-\sqrt{5}}.\sqrt[3]{\sqrt{9+4\sqrt{5}-}3\sqrt{a^2}+\sqrt[3]{a}}}\)=\(-\sqrt[3]{a}-1\)

2.Rút gọn: \(\left(\dfrac{a^3\sqrt[]{a}-2a^3\sqrt{b}+\sqrt[3]{a^2}-\sqrt[3]{b}}{\sqrt[3]{a^2-\sqrt[3]{ab}}}+\dfrac{\sqrt[3]{a^2b}-\sqrt[3]{ab^2}}{\sqrt[3]{a}-\sqrt[3]{b}}\right)1\dfrac{1}{\sqrt[3]{a^2}}\)

1.Tìm x:\(\left(x-3\right)^3\)=\(\dfrac{1}{64}\)

2.Chứng minh:

a,(\(\sqrt[3]{\sqrt[]{9+4\sqrt[]{5}}}\).\(\sqrt[3]{\sqrt[]{5.2}}\)).\(\sqrt[3]{\sqrt[]{5-2}}\) -2,1 <0

3.Rút gọn,\(\dfrac{\sqrt[3]{a^4}+\sqrt[3]{a^2b^2}+\sqrt[3]{b^4}}{\sqrt[3]{a^2}+\sqrt[3]{ab}+\sqrt[3]{b^2}}\)

Mong các bạn giải giúp mik, cảm ơn trước+hậu tạ sau

Giải PT:

a,\(\sqrt{5-x^2}\)=x-1

b,\(\sqrt{x+\sqrt{2x-5}-2}+\sqrt{x-3\sqrt{2x-5}+2}=2\sqrt{2}\)

c,\(x\sqrt{y-1}+2y\sqrt{x-1}=\dfrac{3}{2}xy\)

Mong các bạn giải nhanh giúp mik vs mai mik thi r

1.rút gọn : A=(2-\(\sqrt{2}\))(-5\(\sqrt{2}\))-(3\(\sqrt{2}\)-5)\(^2\)

2.a, rút gọn:B=(\(\dfrac{1}{\sqrt{a}-1}-\dfrac{1}{\sqrt{a}}\)):(\(\dfrac{\sqrt{a}+1}{\sqrt{a}-2}-\dfrac{\sqrt{a}+2}{\sqrt{a}-1}\))

b, Tìm a để B>0

3.-rút gọn C=(\(\dfrac{\sqrt{x}}{3+\sqrt{x}}+\dfrac{x+9}{9-x}\)):(\(\dfrac{3\sqrt{x}+1}{x-3\sqrt{x}}-\dfrac{1}{\sqrt{x}}\))

-Tìm x để C<-1