Question

Answer 1

Cần câu 1 gấp

Đợi 2 tiếng được mỗi câu 2

wed này ko uy tín rồi

Answer 2

Bài 1: 

a: \(\left(x+1\right)^3=x^3+3x^2+3x+1\)

a: \(\left(x-1\right)^3=x^3-3x^2+3x-1\)

a: \(\left(x+1\right)\left(x^2-x+1\right)=x^3+1\)

b: \(\left(x+2\right)^3=x^3+6x^2+12x+8\)

b: \(\left(x-2\right)^3=x^3-6x^2+12x-8\)

b: \(\left(x-2\right)\left(x^2+2x+4\right)=x^3-8\)

c: \(\left(x+3\right)^3=x^3+9x^2+27x+27\)

c: \(\left(3-x\right)^3=27-27x+9x^2-x^3\)

c: \(\left(2x+3\right)\left(4x^2-6x+9\right)=8x^3+27\)

d: \(\left(2x+1\right)^3=8x^3+12x^2+6x+1\)

d: \(\left(2x-y\right)^3=8x^3-6x^2y+12xy^2-y^3\)

d: \(\left(5-y\right)\left(25+5y+y^2\right)=125-y^3\)

 

Answer 3

a)(x+1)^3=x^3 +3.x^3 +3.x +1

b)(x+2)^3=x^3 +3.x^3 .2 +3.x.2^2 +2^3

c)(x+3)^3=x^3 +3.x^2 .3 +3.x.3^2 + 3^3

d)(2x+1)^3=(2x)^3 +3.(2x)^2 +3.(2x) +1^3

Answer 4

B2

a)=(x+1)^3                                             a)=(x-1)^3

b)=(x+2)^3                                             b)=(x-2)^3

c)=(x+3)^3                                             c)=(x-3)^3

d)=(x+y)^3                                              d)=(x-y)^3

Answer 5

Bài 2: 

a: \(x^3+3x^2+3x+1=\left(x+1\right)^3\)

b: \(x^3+6x^2+12x+8=\left(x+2\right)^3\)

c: \(x^3+9x^2+27x+27=\left(x+3\right)^3\)

d: \(x^3+3x^2y+3xy^2+y^3=\left(x+y\right)^3\)

a: \(x^3-3x^2+3x-1=\left(x-1\right)^3\)

b: \(x^3-6x^2+12x-8=\left(x-2\right)^3\)

c: \(x^3-9x^2+27x-27=\left(x-3\right)^3\)