Question

Factorise y^4+12y^2+64​

Answer 1

${y}^{4} + 12 {y}^{2} + 64 \\ {y}^{2} ( {y}^{2} + 12) + 64$

Answer 2

Answer:

$=(y^{2} + 8 + 2y)(y^{2} + 8 - 2y)$

Step-by-step explanation:

$(y^{2} )^{2} + 2.y^{2}.8 + 8^{2} - 4y^{2}$

$=(y^{2} + 8)^{2} - (2y)^{2}$

$=(y^{2} + 8 + 2y)(y^{2} + 8 - 2y)$