\(6x^4-11x^2+3=6x^4-9x^2-2x^2+3\)
\(=3x^2\left(2x^2-3\right)-\left(2x^2-3\right)\)
\(=\left(3x^2-1\right)\left(2x^2-3\right)\)
\(6x^4-11x^2+3=6x^4-2x^2-9x^2+3\)
\(=\left(6x^4-2x^2\right)-\left(9x^2-3\right)=2x^2.\left(3x-1\right)-3.\left(3x-1\right)\)
\(=\left(3x-1\right)\left(2x^2-3\right)\)
Chúc bạn học tốt!!!