What is the answer to these two trinomial problem? x3+5x3-4x-20, x3 + 9x2-36x-324

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Thanks Steve but that was not one of the choices..( ) ( ) ( ) the answers should look like this. The math question again is x3+9x2-36x-324 factors as 1.) (x-6)(x+6)(x+9) 2.)(x-9)(x+9)(x-6) 3.)(x-9)(x+9)(x+6) 4.)(x-6)(x+6)(x-9) Next problem is X3+5x3-4x-20 1.)(x-5)(x+5)(x-2) 2.)(x-5)(x+5)(x+2) 3.)(x-2)(x+2)(x+5) 4.)(x-2)(x+2)(x-5) can you show your work to please!