Question

[Nguyễn Ẩn]

Bài 1:khai triển

A. (x+5)²

B. (x-3y)²

C. (x²-6z)(x²+6z)

D. (x+3y)³

E.(27y³-9y²+y-1/27

G. 8x⁶+12x⁴y+6x²y²+y³

H. 4x²+12x⁴y+6x²2y²+y³

Answer 1

[Nguyễn Ngọc Lộc]

Bài 1 : Khai triển :

a, \(\left(x+5\right)^2=x^2+10x+25\)

b, \(\left(x-3y\right)^2=x^2-6xy+9y^2\)

c, \(\left(x^2-6z\right)\left(x^2+6z\right)=x^4-36z^2\)

d, \(\left(x+3y\right)^3=x^3+9x^2y+27xy^2+27y^3\)

e, \(27x^3-9y^2+y-\frac{1}{27}=\left(3x-\frac{1}{3}\right)^3\)

g, \(8x^6+12x^4y+6x^2y^2+y^3=\left(2x^2+y\right)\)

h, \(4x^2+12x^4y+6x^22y^2+y^3=\left(\sqrt[3]{4x^2}+y\right)\)