How do you simplify $8x (x^3 + 2x^2 + x) + 4x (x^2 - x + 4)$ ?

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Answer 1 · 2015-06-25T07:27:03

Multiply out to get rid of the brackets and then factorise

$8x(x^3+2x^2+x) + 4x(x^2-x+4)$ = $8x^4 +16x^3 +8x^2 +4x^3 - 4x^2 +16x$

= $8x^4+ 20x^3 +4x^2$ = $4x^2(2x^2+5x+1)$

How do you simplify 8x (x^3 + 2x^2 + x) + 4x (x^2 - x + 4)8x (x^3 + 2x^2 + x) + 4x (x^2 - x + 4)?