How do you combine $(x^{2} + 3 x) - (x^{2} + x)$ $(x^2 + 3x) - (x^2 + x)$ ?

Question

1485 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-07-11T16:48:56

$= 2 x$ $= color(blue)(2x)$

$x^{2} + 3 x - x^{2} - x$ $x^2+3x-x^2-x$

Combining like terms
$x^{2} - x^{2} + 3 x - x$ $color(green)(x^2-x^2)+color(blue)(3x-x)$

$= 0 + 3 x - x$ $= color(green)(0)+color(blue)(3x-x)$

$= 2 x$ $= color(blue)(2x)$

How do you combine (x2+3x)−(x2+x)(x^2 + 3x) - (x^2 + x)?