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4(x+4)(x-1)

Guest May 14, 2017
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To multiply this out..

4(x + 4)(x - 1)

 

First we can multiply the 4 by (x + 4)

= (4x + 16)(x - 1)

 

Next, let's multiply the (4x + 16) by (x - 1) ...to do this, we need to multiply each thing in the first set of parenthesees by each thing in the second set of parenthesees and add the products together.

 

= (4x)(x) + (4x)(-1) + (16)(x) + (16)(-1)

 

= 4x2 - 4x + 16x - 16

 

= 4x2 + 12x - 16

hectictar  May 14, 2017

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