How do you simplify $x (7+x)$ ?

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Answer 1 · 2015-07-07T03:36:46

$=color(blue)(x^2 +7x$

$color(blue)(x)(7+x)$
Here $color(blue)(x)$ needs to be multiplied with each of the terms within the brackets.

$=color(blue)(x).(7) +color(blue)(x).(x)$

$=7x +x^2$

$=color(blue)(x^2 +7x$

How do you simplify x (7+x)x (7+x)?