\(126y^3+\left(x-5y\right).\left(x^2+25y^2+5xy\right)\)
\(=126y^3+x^3-125y^3\)
\(=x^3+y^3\)
\(=\left(x+y\right)\left(x^2-xy+y^2\right)\)
Tính hđt sau:
(x - 5y) (x 2 + 5xy 2 + 25y 4 )
Tính :
1. ( y - 3 ) ( y + 3 )
2. ( m + n ) ( m2 - mn + n2 )
3. ( 2 - a ) ( 4 + 2a + a2 )
4. ( 2n + 3m ) ( 4n2 - 6nm + 9m2 )
5. ( x2 + x + 2 ) ( x2 - x - 2 )
6. 126y3 = ( x - 5y ) ( x2 + 25y2 )
7. ( a + 1 ) ( a + 2 ) ( a2 + 4 ) ( a - 1 ) ( a2 + 1 ) ( a - 2 )
\(A=x^5y^2+7x^2y^4+5xy^3+xy+2\)
\(B=x^2y^4+5xy^3+x^5y^2\)
Tính A-B
Cho 2 đa thức
\(A=x^5y^2+7x^2y^4+5xy^3+xy+2\)
\(B=x^2y^4+5xy^3+x^5y^2\)
Tính A+B
a) (5x + y/x^2 + 5xy). x^2 - 25y^2/x^2 + y^2
(5x + y/x^2 + 5x-y/x^- 5xy). x^2 - 25y^2/x^2 + y^2
ai nhanh mình tick
bai 1 thuc hien phep tinh a)\(\dfrac{\left(\dfrac{1}{x^2+4x+4}-\dfrac{1}{x^2-4x+4}\right)}{\left(\dfrac{1}{x+2}+\dfrac{1}{x-2}\right)}\)
b)\(\left(\dfrac{5x+y}{x^2-5xy}+\dfrac{5x-y}{x^2+5xy}\right)\cdot\dfrac{x^2-25y^2}{x^2+y^2}\)
phân tich da thuc thanh nhan tu
1)x^3 +x^3y - x^3z - xyz
2)5xy^3 + 30x^2 z^2 - 6x^3 yz - 25y^2 z
3)25x^2-1/8x^2y^2
4)a^3x-ab+b-x
Nhân các đa thức sau:
a) 1 3 x + 2 ( 3 x − 6 ) ; b) ( 5 xy − 1 ) 1 10 y 3 − 2 x 2 − 2 5 y
c) (x + 3) ( x 2 – 3 x + 9 ).
