\(4x^3-25x^2-53x-24\)
\(=4x^3+4x^2-29x^2-29x-24x-24\)
\(=4x^2\left(x+1\right)-29x\left(x+1\right)-24\left(x+1\right)\)
\(=\left(x+1\right)\left(4x^2-29x-24\right)\)
\(=\left(x+1\right)\left(4x^2-32x+3x-24\right)\)
\(=\left(x+1\right)\left[4x\left(x-8\right)+3\left(x-8\right)\right]\)
\(=\left(x+1\right)\left(x-8\right)\left(4x+3\right)\)