Evaluate these using identity :33 × 27

1.	Evaluate these using identity :33 × 27
Answer» 33 × 27 = (30 + 3) (30 – 3) identity (a + b)(a – b) = a² – b² Here a = 30,b = 3 (30 + 3)(30 – 3) = 30² – 3² = 900 – 9 33 × 27 = 891

Answer»

33 × 27 = (30 + 3) (30 – 3)

identity (a + b)(a – b) = a² – b²

Here a = 30,b = 3

(30 + 3)(30 – 3) = 30² – 3² = 900 – 9

33 × 27 = 891

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