What is the product of x+5 and x^2+3x-4 show all work for brainleist (write you answer in standard form and use box method or distributive property)

  x^3 +8x^2 +11x -20

Step-by-step explanation:

(x+5)  * (x^2+3x-4)

Multiply x * (x^2+3x-4)   = x^3 + 3x^2 -4x

Multiply 5 *  (x^2+3x-4)  =          5x^2+ 15x  -20

Add                                  

                                             x^3 +8x^2 +11x -20

(x+5)  * (x^2+3x-4)

x * (x^2+3x-4)   = x^3 + 3x^2 -4x

5 *  (x^2+3x-4)  =  5x^2+ 15x  -20

x^3 +8x^2 +11x -20

Step-by-step explanation:

b.my answer is b.

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