Math, asked by stanishitha8stdsajv, 3 months ago

18. Expand using appropriate Identities:
y* .81

Answers

Answered by shreekrishna35pdv8u8

0

Answer:

Step-by-step explanation:

$y^{2} -81\\=y^{2} -9^{2} \\=(y+9)(y-9)$

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