x⁴ + 64 = (x⁴ +  16x² + 64) - 16x² = (x² + 8)² - (4x)² = (x² - 4x + 8).(x² + 4x + 8)

Ta có

x⁴ + 64

= (x⁴ +  16x² + 64) - 16x² 

= (x² + 8)² - (4x)² 

= (x² - 4x + 8).(x² + 4x + 8)

hok tốt

Ta có: 
x^4 + 64 = (x²)² + 8² + 2x².8 - 2.x².8 
= (x² + 8)² - (4x)² 
= (x² - 4x + 8)(x² + 4x + 8) 

Ta có: 
x^4 + 64 = (x²)² + 8² + 2x².8 - 2.x².8 
= (x² + 8)² - (4x)² 
= (x² - 4x + 8)(x² + 4x + 8) 

Ta có: 

x^4 + 64 = (x²)² + 8² + 2x².8 - 2.x².8 

= (x² + 8)² - (4x)² 

= (x² - 4x + 8)(x² + 4x + 8) 

k nhoa

Ta có: 

x^4 + 64 = (x²)² + 8² + 2x².8 - 2.x².8 

= (x² + 8)² - (4x)² 

= (x² - 4x + 8)(x² + 4x + 8) 

k nhoa

\(x^4+64=\left(x^2\right)^2+8^2=\left(x^2+8\right)\left(x^2-8\right)\)

câu hỏi hay......nhưng tui xin nhường cho các bn khác

Hãy tích đúng cho tui nha

THANKS

x⁴ + 64

= x⁴ + 16x² + 64 - 16x²

= (x² + 8)² - (4x)²

= (x² - 4x + 8)(x² + 4x + 8)

4x⁴ + 1

= 4x⁴ + 4x² + 1 - 4x²

= (2x² + 1) - (2x)²

= (2x² - 2x + 1)(2x² + 2x + 1)

64x⁴ + 1

= 64x⁴ + 16x² + 1 - 16x²

= (8x² + 1)² - (4x)²

= (8x² - 4x + 1)(8x² + 4x + 1)

x^4+4=x^4 + 4x^2 +4 - 4x^2=(x^2)^2+ 2.x^2.2+2^2 - (2x)^2 = (x^2+2)-(2x)^2 =(x^2+2-2x)(2^2+2-2x)

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

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

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

\(x^5+x+1=\left(x^5+x^4+x^3\right)-\left(x^4+x^3+x^2\right)+\left(x^2+x+1\right)\)

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

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