1) ( x - 2 ) ( x2 + 2x +4 )
2) ( x+4) ( x2 - 4x + 16 )
3) ( x - 3y ) (x2 + 3xy + 9y2 )
4) ( x2 - 1/3 ) ( x4 + 1/3x2 + 1/9 )
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(-x-y^2+x^2-y=-\left(x+y\right)-\left(x-y\right)\left(x+y\right)=\left(x+y\right)\left(-1-x+y\right)\)
ta có :
\(\left(2x+1\right)^2-\left(x-1\right)^2=\left(2x+1+x-1\right)\left(2x+1-x+1\right)=3x\left(x+2\right)\)
x4 + x3 + x +1
= x3(x+1) + (x+1)
=(x+1)(x3 +1)
= (x+1)(x+1)(x2 - x-1)
= (x+1)2(x2 -x+1)
(2x-3)(5-x)
=2x(5-x) - 3(5-x)
= 10x - 2x2 - 15 + 3x
= -2x2 - 15 + 13x
\(\left(2x-3\right)\left(5-x\right)=10x-2x^2-15+3x\)
\(=13x-2x^2-15\)
x3 - 3x2 - 4x + 12
= x2(x-3) - 4(x-3)
= (x-3)(x2 -4)
=(x-3)(x-2)(x+2)
\(x^3-3x^2-4x+12\)
\(=\left(x^3-3x^2\right)-\left(4x-12\right)\)
\(=x^2\left(x-3\right)-4\left(x-3\right)\)
\(=\left(x^2-4\right)\left(x-3\right)\)
\(=\left(x-2\right)\left(x+2\right)\left(x-3\right)\)
1) ( x - 2 ) ( x2 + 2x +4 )=\(x^3-8\)
2) ( x+4) ( x2 - 4x + 16 ) \(=x^3+64\)
3) ( x - 3y ) (x2 + 3xy + 9y2 ) \(=x^3-27y^3\)
4) ( x2 - 1/3 ) ( x4 + 1/3x2 + 1/9 ) \(=x^6-\frac{1}{27}\)