Question 629350
<pre><b>
(-8x³ + x) - (-6x + 8 + 4x³)

Place a 1 in front of both parentheses:

1(-8x³ + x) - 1(-6x + 8 + 4x³)

Remove the parentheses by distributing the 1 and the -1 into
the parentheses:

-8x³ + 1x + 6x - 8 - 4x³

I'll color the like terms the same color:

<font color="red">-8x³</font> <font color="blue">+ 1x + 6x</font> - 8 <font color="red">- 4x³</font>

Combine the red terms and the blue terms:

<font color="red">-12x³</font> <font color="blue">+ 7x</font> - 8 

Edwin</pre>