Special Products
Example 110
$\;\;\;(8y^{2} + 11x^{2})(8y^{2} - 11x^{2})$
$=(A + B)( A - B) \text{ , where } A = 8y^{2} \text{ and } B = 11x^{2} $
$=A^2-B^2$
$=(8y^{2})^2 - (11x^{2})^2 $
$=64y^{4} - 121x^{4} $
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