Special Products
Example 111
$\;\;\;(3 + 10x^{4}y^{7})(3 - 10x^{4}y^{7})$
$=(A + B)( A - B) \text{ , where } A = 3 \text{ and } B = 10x^{4}y^{7} $
$=A^2-B^2$
$=(3)^2 - (10x^{4}y^{7})^2 $
$=9 - 100x^{8}y^{14} $
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