Ex 12.1, 3 (v) - Chapter 12 Class 8 Factorisation

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Ex 12.1, 3 Factorise. (v) z – 7 + 7 x y – x y zz – 7 + 7 x y – x y z = (z − 7) + (7xy − xyz) = (z − 7) + 𝒙y (7 − z) = (z −7) + 𝑥y × −(z − 7) = (z − 7) − 𝑥y (z − 7) Taking (z − 7) common = (z − 7) (1 − 𝒙y)

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