How do you multiply $(x + 1) (x + 4)$ $(x + 1)(x + 4)$ ?

Question

5302 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-07-01T16:48:43

$= x^{2} + 5 x + 4$ $=color(blue)(x^2 + 5x +4$

$(x + 1) (x + 4)$ $color(blue)((x+1))(x+4)$

$= (x) . (x + 4) + 1 . (x + 4)$ $=color(blue)((x) ). (x+4) +color(blue)(1). (x+4)$

$= x^{2} + 4 x + x + 4$ $=x^2 + 4x+x +4$
$= x^{2} + 5 x + 4$ $=color(blue)(x^2 + 5x +4$

How do you multiply (x + 1)(x + 4)(x+1)(x+4)(x + 1)(x + 4)?