Question

y²-3=0 [ hint (√3)²=3) by factorsation method

Answer 1

${y}^{2} = 3$
${y}^{2} = { \sqrt{3} }^{2}$
$y = \sqrt{3}$

Answer 2

y^2-(√3)^2
now applying the formula a^2-b^2=(a+b)(a-b)

so....(y+√3)(y-√3)

these are the factors.....hope u understand.