[tex]a) {x}^{2} (x + 2) - 16(x + 2) = (x + 2)( {x}^{2} - 16) = (x + 2)(x - 4)(x + 4)[/tex]
[tex]b) {x}^{2} (x + 5) - 9(x + 5) = (x + 5)( {x}^{2} - 9) = (x + 5)(x - 3)(x + 3)[/tex]
[tex]d)(4(x - 5) - 3(2x - 3)) \times (4(x - 5) + 3(2x - 3)) = (4x - 20 - 6x + 9)(4x - 20 + 6x - 9) = ( - 2x - 11)(10x - 29)[/tex]