Question

𝑥⁴+ 4=? (phân tích thành nhân tử)

Answer 1

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

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

Answer 2

\(x^4+4\)

\(=\left(x^2\right)^2+2^2\)\(+2x^22-4x^2\)

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

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