Question 23347
<pre>2x^-2y^0(x^2y^0-4x^-6y^4
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Is this what you mean?

2x<sup>-2</sup>y<sup>0</sup>(x<sup>2</sup>y<sup>0</sup> - 4x<sup>-6</sup>y<sup>4</sup>)

If so, replace both y<sup>0</sup>'s by 1.

2x<sup>-2</sup>·1(x<sup>2</sup>·1 - 4x<sup>-6</sup>y<sup>4</sup>)

2x<sup>-2</sup>(x<sup>2</sup> - 4x<sup>-6</sup>y<sup>4</sup>)

Now use the distributive principle:

2x<sup>-2</sup>·x<sup>2</sup> - 8x<sup>-2</sup>·4x<sup>-6</sup>y<sup>4</sup>

Add the exponents of x in the first term: -2 + 2 = 0,
so replace x<sup>-2</sup>·x<sup>2</sup> by x<sup>0</sup>

2x<sup>0</sup> - 8x<sup>-2</sup>·x<sup>-6</sup>y<sup>4</sup>

But x0 is just 1, so replace x<sup>0</sup> by 1

2·1 - 8x<sup>-2</sup>x<sup>-6</sup>y<sup>4</sup>

2 - 8x<sup>-2</sup>x<sup>-6</sup>y<sup>4</sup>

Now add the exponents of x in the second term:
-2 + -6 = -8. so replace x<sup>-2</sup>x<sup>-6</sup> by x<sup>-8</sup>

2 - 8x<sup>-8</sup>y<sup>4</sup>

To get rid of the negative exponent in x<sup>-8</sup>, replace
x<sup>-8</sup> by 1/x<sup>8</sup>

2 - 8(1/x<sup>8</sup>)y<sup>4</sup>

Simplify the second term:

2 - 8y<sup>4</sup>/x<sup>8</sup>
 
Edwin
AnlytcPhil@aol.com</pre>