Question

Factorise fully ign="absmiddle" class="latex-formula">

Answer 1

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

a=y b=2

3y(y+2)(y-2)

Answer 2

Answer:

${3y}^{3} - 12y \\ = 3y( {y}^{2} - 4) \\ = 3y( {y}^{2} - {2}^{2} ) \\ = 3y(y - 2)(y + 2) \\ = 3y(y + 2)(y - 2)$