a ) \(\left(4x^2+4xy+y^2\right):\left(2x+y\right)\)

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

\(=2x+y\)

b ) \(\left(27x^3+1\right):\left(3x+1\right)\)

\(=\left(3x+1\right)\left(9x^2-3x+1\right):\left(3x+1\right)\)

\(=9x^2-3x+1\)

c ) \(\left(x^2-6xy+9y^2\right):\left(3y-x\right)\)

\(=\left(x-3y\right)^2:\left(3y-x\right)\)

\(=\left(3y-x\right)^2:\left(3y-x\right)\)

\(=3y-x\)

d ) \(\left(8x^3-1\right):\left(4x^2+2x+1\right)\)

\(=\left(2x-1\right)\left(4x^2+2x+1\right):\left(4x^2+2x+1\right)\)

\(=2x-1\)

:D

b) \(\left(4x^2+4xy+y^2\right):\left(2x+y\right)=\dfrac{\left(2x+y\right)^2}{2x+y}=2x+y\)

c) \(\left(x^2-6xy+9y^2\right):\left(3y-x\right)=\dfrac{\left(3y-x\right)^2}{3y-x}=3y-x\)

a.x^3-1^3

b.x^3-5^3

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

d)x^3+1/2^3

\(a,=\left(x+1\right)^2\\ b,=\left(y-2\right)^2\\ c,=\left(x-3\right)^2\\ d,=\left(a-7\right)^2\\ e,=\left(m-2\right)^2\\ f,=\left(2x-1\right)^2\\ g,=\left(a+5\right)^2\\ h,=\left(z-10^2\right)\\ i,=\left(x+3y\right)^2\\ j,=\left(2x-5b\right)^2\\ k,=\left(a+5\right)^2\\ l,=\left(x^2+1\right)^2\\ m,=\left(y^3-1\right)^2=\left(y-1\right)^2\left(y^2+y+1\right)^2\\ n,=\left(c^5-5\right)^2\\ o,=\left(3x^2+2y\right)^2\\ p,=5m^2n^3\left(5m^2n^3-2\right)\)

a: \(\left(2x-1\right)^2-2\left(2x-3\right)^2+4\)

\(=4x^2-4x+1+4-2\left(4x^2-12x+9\right)\)

\(=4x^2-4x+5-8x^2+24x-18\)

\(=-4x^2+20x-13\)

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

a: Ta có: \(\left(2x-1\right)^2-2\left(2x-3\right)^2+4\)

\(=4x^2-4x+1-2\left(4x^2-12x+9\right)+4\)

\(=4x^2-4x+5-8x^2+24x-18\)

\(=-4x^2+20x-13\)

b: \(\left(3x+2\right)^2+2\left(3x+2\right)\left(1-2y\right)+\left(1-2y\right)^2\)

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

\(=\left(3x-2y+3\right)^2\)

1: Ta có: \(\left(x+3\right)\left(x^2-3x+9\right)-\left(x^3+54\right)\)

\(=x^3+27-x^3-54\)

=-27

2: Ta có: \(\left(2x+y\right)\left(4x^2-2xy+y^2\right)-\left(2x-y\right)\left(4x^2+2xy+y^2\right)\)

\(=8x^3+y^3-8x^3+y^3\)

\(=2y^3\)​

\(1,=x^3+270-x^3-54=-27\\ 2,=8x^3+y^3-8x^3+y^3=2y^3\\ 3,=x^3-3x^2+3x-1-x^3-8+3x^2-48=3x-57\\ 4,=x^3-x-x^3-1=-x-1\\ 5,=8x^3-5\left(8x^3+1\right)=-32x^3-5\\ 6,=27+x^3-27=x^3\\ 7,làm.ở.câu.3\\ 8,=x^3-6x^2+12x-8+6x^2-12x+6-x^3-1+3x\\ =3x-3\)

Bài 1

a) (15x⁴ - 8x³ + 3x²) : 3x² = 15x⁴ : 3x² - 8x³ : 3x² + 3x² : 3x² = 5x² - \(\dfrac{8}{3}x\) + 1

b) (4x² - 4xy + y²) : (2x - y) = (2x - y)² : (2x - y) = 2x - y

c) dùng phương pháp chia đa thức 1 biến đã sắp xếp nha

d) (x² - 2x + 1) : (x - 1) = (x - 1)² : (x - 1) = x - 1

Bài 2

a) x² + 3x + 3xy + 9xy = x² + 3x + 12xy = x (x + 3 + 4y)

b) ​x² - y² + 2x + 1 = x² + 2x + 1 - y²​ = (x + 1)² - y² = (x + 1 - y)(x + 1 + y)

c) x² - xy + x - y = x (x - y) + (x - y) = (x - y)(x + 1)

x4,x2,y2 là mũ nhá các bn

giúp mk nhanh lên mình sắp phải nộp r

Lời giải:

a) (x2 + 2xy + y2) : (x + y)

= (x + y)2 : (x + y)

= x + y

b) (125x3 + 1) : (5x + 1)

= [(5x)3 + 1] : (5x + 1)

= (5x + 1)[(5x)2 – 5x + 1]] : (5x + 1)

= (5x)2 – 5x + 1

= 25x2 – 5x + 1

c) (x2 – 2xy + y2) : (y – x)

= (x – y)2 : [-(x – y)]

= -(x – y)

= y – x

Hoặc (x2 – 2xy + y2) : (y – x)

= (y2 – 2yx + x2) : (y – x)

= (y – x)2 : (y – x)

= y – x

\(\text{a) (x^2 + 2xy + y^2) : (x + y)}\\ \left(x+y\right)^2:\left(x+y\right)=x+y\)

a)x+y

b)25x²-5x+1

c)-x+y

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

b.\(4-4x^2+x^4=\left(2-x^2\right)^2\)

c. \(x^2-6y+9y^2=\left(x-3y\right)^2\)

d. \(\left(2x+y^2\right)\left(2x-y^2\right)=4x^2-y^4\)

a) x² - 10x + 25x = ( x - 5)²

b) 4 - 4x² + x⁴ = ( 2 - x² )²

c) x² - 6xy + 9y² = (x - 3y )²

d_ (2x + y² ). (2x - y² ) = 4x² - y⁴