Question

please answer fast
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Answer 1

${y}^{4} - \frac{9}{4}$

Hope you it's helpful

Answer 2

$( {y}^{2} + \frac{3}{2} )( {y}^{2} - \frac{3}{2} )$

$({y^{2} })^{2} - ( { \frac{3}{2}) }^{2}$

${y}^{4} - \frac{9}{4}$