Question

factorise (y²-3) (y²+3)​

Answer 1

Answer:

y^4 x 9

Step-by-step explanation:

(y²-3) (y²+3)

= (y²)² x 3²

= y^4 x 9

Answer 2

Answer:

$\mathbb\red{ \tiny A \scriptsize \: N \small \:S \large \: W \Large \:E \huge \: R}$

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Use Difference of Squares: $\rm{a}^{2}-{b}^{2}=(a+b)(a-b)$

$\\ \rm\implies( {y}^{2} ) ^{2} - {3}^{2}$

$\\ \boxed{\color{violet} \rm\implies {y}^{4} - 9}$