\(1+9-1+1=10\)

= 100000000000

\(\frac{2x-y}{x+y}=\frac{2}{3}\)\(\Rightarrow3\left(2x-y\right)=2\left(x+y\right)\)

\(\Rightarrow6x-3y=2x+2y\)

\(\Rightarrow4x=5y\)

\(\Rightarrow\frac{x}{y}=\frac{5}{4}\)

Vậy.........

=>S=2².(1²+2²+3²+...+10²)

=>S=4.385

=>S=1640

(x-2)³-x(x+1)(x-1)+6x²=5

(x³-6x²+12x-8)-x(x²-1)+6x²=5

x³-6x²+12x-8-x³+x+6x²=5

12x+x=5+8

13x=13

x=1

Vậy x=1

KHÔNG CÓ ĐỀ BÀI GIẢI KIỂU GÌ BẠN ƠI!

\(a\)) \(x^2=16\)

\(\Rightarrow x^2=\left(-4,4\right)^2\)

\(\Rightarrow\orbr{\begin{cases}x=-4\\x=4\end{cases}}\)

Vậy \(x\in\left\{-4,4\right\}\)

\(b\)) \(x^3=-8\)

\(\Rightarrow x^3=\left(-2\right)^3\)

\(\Rightarrow x=-2\)

Vậy \(x=-2\)

a) 6 + 2 x 64 x 3 + 4 x 36

= 6 + 6 x 64 + 4 x 6 x 6

= 6 + 6 x 64 + 6 x 24

= 6 x (1 + 64 + 24)

= 6 x 89

= 534

b) 4 + 6 + 12 + ... + 2008 + 2012

= 2 x (2 + 3 + 4 + ... + 1004 + 1005)

= 2 x (2 + 1005) x 1004 : 2

= 1007 x 1004

= 1011028

a/

=> x² = (+-4)²

=>x = 4 hoặc -4

b/ 

=> x³ = (-2)³ => x = -2