\(1,=2x^2-6x+x-3=2x\left(x-3\right)+\left(x-3\right)=\left(2x+1\right)\left(x-3\right)\\----------\\ 2,=x^4-4x^2-9x^2+36=x^2\left(x^2-4\right)-9\left(x^2-4\right)=\left(x^2-4\right)\left(x^2-9\right)=\left(x-2\right)\left(x+2\right)\left(x-3\right)\left(x+3\right)\)