Question 1175655
<pre>

d( x ) = −x<sup>3</sup>

You want d(4a<sup>2</sup>)

So take out the x's and put empty parentheses in their place, like this:

d( x ) =   −x<sup>3</sup>

d(   ) = -(   )<sup>3</sup>

Then put 4a<sup>2</sup> in the empty parentheses:

d(4a<sup>2</sup>) = -(4a<sup>2</sup>)<sup>3</sup>

Then simplify the right side,

d(4a<sup>2</sup>) = -4<sup>3</sup>a<sup>6</sup>

d(4a<sup>2</sup>) = -64a<sup>6</sup>

Edwin</pre>