thu gon bt sau:\(\left(x^{2n}+x^ny^n+y^{2n}\right)\left(x^n-y^n\right)\left(x^{3n}+y^{3n}\right)\)
Những câu hỏi liên quan
\(\left(x^{2n}+x^ny^n+y^{2n}\right)\left(x^n-y^n\right)\left(x^{3n}+y^{3n}\right)\)
thực hiện phép tính
\(\left(x^{2n}+x^ny^n+y^{2n}\right)\left(x^n-y^n\right)\left(x^{3n}+y^{3n}\right)\)
\(\left(x^{2n}+x^ny^n+y^{2n}\right)\left(x^n-y^n\right)\left(x^{3n}+y^{3n}\right)\)
\(=\left(x^{3n}-y^{3n}\right)\left(x^{3n}+y^{3n}\right)\)
\(=x^{6n}-y^{6n}\)
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8 tháng 7 2018 lúc 16:31
Thực hiện phép tính :
\(\left(x^{2n}+x^ny^n+y^{2n}\right).\left(x^n-y^n\right).\left(x^{3n}+y^{3n}\right)\)
Giúp mình nha ! Ai nhanh và đúng nhất mình tick cho nhé !
Bai 1 : Tính
a) \(\left(3x^n+1-2x^n\right)4x^2\)
b) 2\(\left(x^{2n}+2x^ny^n+y^{2n}\right)-y^n\left(4x^n+2y^n\right)\)
c)\(\left(x^{2n}+x^ny^n+y^{2n}\right)\left(x^n-y^n\right)\left(x^{3n}+y^{3n}\right)\)
d)\(4^{n+1}-3.4^n\)
[Các bạn giúp mình nha ! Plz ]
a: \(=12x^{n+2}+4x^2-8x^{n+2}\)
\(=4x^{n+2}+4x^2\)
b: \(=2x^{2n}+4x^ny^n+2y^{2n}-4x^ny^n-2y^{2n}\)
\(=2x^{2n}\)
c: \(=\left(x^{3n}-y^{3n}\right)\left(x^{3n}+y^{3n}\right)\)
\(=x^{6n}-y^{6n}\)
d: \(=4^n\cdot4-3\cdot4^n=4^n\)
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Làm tính nhân: a. \(\left(3x^{2m-1}-\dfrac{3}{7}y^{3n-5}+x^{2m}y^{3m}-3y^2\right)8x^{3-2m}y^{6-3n}\)
b.\(\left(2x^{2n}+3x^{2n-1}\right)\left(x^{1-2n}-3x^{2-2n}\right)\)
a: \(=24x^{2m-1+3-2m}y^{6-3m}-\dfrac{24}{7}y^{3n-7+6-3n}\cdot x^{3-2m}+8x^{3-2m+2m}\cdot y^{6-3n+3m}-24x^{3-2m}y^{6-2n+2}\)
\(=24x^2y^{6-3m}-\dfrac{24}{7}x^{3-2m}\cdot y^{-1}+8x^3y^{-3n+3m+6}-24x^{3-2m}y^{-2n+8}\)
b: \(=2x^{2n+1-2n}-6x^{2n+2-2n}+3x^{2n-1+1-2n}-9x^{2n-1+2-2n}\)
\(=2x-6x^2+3-9x\)
\(=-6x^2-7x+3\)
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thực hiện phép tính:a/ \(2\left(x^{2n}+2x^ny^n+y^{2n}\right)-y^n\left(4x^n+2y^n\right)\) b/ \(\left(3x^{2m-1}-\frac{3}{7}y^{3n-5}+y^{2m}y^{3n}-3y^2\right)8x^{3-2m}y^{6-3n}\)
Bài 1: Thực hiện phép tính:
A = \(\left(2x^{2n}+3x^{2n-1}\right)\left(x^{1-2n}-3x^{2-2n}\right)\)
B = \(\left(3x^{2m-1}-\frac{3}{7}y^{3n-5}+x^{2m}y^{3n}-3y^2\right).8x^{3-2m}y^{6-3n}\)
Giúp e vs m.n ơi!!!!
1. tính GTBT:
\(B=\frac{2}{3}x^2y\left(2x^2-\frac{y}{3}\right)-2x^2\left(2x^2-1\right)+\left(2x^2-\frac{y}{3}\right).2x\)
2.tính:
\(P=3x^n\left(4x^{n+1}-1\right)-2x^{n+1}\left(6x^{n-2}-1\right)\)
\(Q=\left(x^{2n}+x^ny^n+y^{2n}\right).x^n.y^n\)
Phân tích thành nhân tử
A) \(15x^ny^{2n}-3x^{n+1}\left(-y\right)^{2n}\)
B) \(4x^{2n}y^{n-1}+2\left(-x\right)^{2n+1}y^n\)
a) \(15x^ny^{2n}-3x^{n+1}\left(-y\right)^{2n}\)
\(=x^ny^{2n}\left(15-3x\right)\)
\(=3x^ny^{2n}\left(5-x\right)\)
b) \(4x^{2n}y^{n-1}+2\left(-x\right)^{2n+1}y^n\)
\(=4x^{2n}y^{n-1}-2x^{2n+1}y^n\)
\(=2x^{2n}y^{n-1}\left(2-xy\right)\)