Question

plz solve this question​

Answer 1

Answer:

y^4-9/4

Step-by-step explanation:

as we know

(a+b)(a-b)=a^2-b^2

(y^2+3/2)(y^2-3/2)

=y^4-9/4

(^ denotes power )

Answer 2

Step-by-step explanation:

$as \: we \: know \: that \\ (x - y)(x + y) = {x}^{2} - {y}^{2} \\ therefore \\ ( {y}^{2} + \frac{3}{2} )( {y}^{2} - \frac{3}{2} ) = {y}^{4} - \frac{9}{4} \\ hope \: its \: helpful$