Question

factorise completely y2 -9​

Answer 1

Answer:(y+3) (y-3)

Step-by-step explanation:

y^2-9

=(y)^2-(3)^2

=(y+3) (y-3)

Answer 2

Step-by-step explanation:

${y}^{2} - 9$

${y}^{2} - {3}^{2}$

$using \: identity \: {a}^{2} - {b}^{2} = (a + b)(a - b)$

$(y + 3)(y - 3)$

$y = + 3 \: and - 3$

Thanks ❤

#kanika...

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