Question

find the value fastly​

Answer 1

$\left( {y}^{2} + \dfrac{3}{2} \right)\left( {y}^{2} - \dfrac{3}{2} \right)$

$= { ({y}^{2} )}^{2} - \left( \dfrac{3}{2} \right) ^{2}$

$= {y}^{4} - \dfrac{9}{4}$

Answer 2

Explanation:

$y {}^{4 } - (3 \div 2) { }^{2}$

here we have use a^2-b^2=(a+b)(a-b)

hope that it will help you...