Question

Hey can you please help me posted picture of question

Answer 1

The correct answer is option C.

Step by step solution is listed below.

$(4 x^{3}+8x)( x^{2} -1) \\ \\ =4 x^{3}(x^{2} -1)+8x(x^{2} -1) \\ \\ =4x^{5}-4 x^{3}+8 x^{3}-8x \\ \\ =4 x^{5}+4 x^{3}-8x$