IP1U4 SWI (Algebraic Identities) Q20

IP1U4 SWI (Algebraic Identities) Q20

IP 1

Factorise completely

\(m^2 - 4n^2 - 4n - 1\)
\(a^2 - 2ab + b^2 - c^2\)
\(25 - x^2 - y^2 - 2xy\)
\(9m^2 - 6mn + n^2 - 81\)

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Answer:(i) \((m+2n+1)(m-2n-1)\) (ii) \((a-b+c)(a-b-c)\) (iii) \((5+x+y)(5-x-y)\) (iv) \((3m-n+9)(3m-n-9)\)

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