Question

Give Answer of questions
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Answer 1

Answer: (i) 0.04x² + 0.16xy + 0.16y²

              (ii) xyz² + xyz - 6

Step-by-step explanation:

(i) (0.2x + 0.4y)² -------------> (a + b)² = a² + 2ab + b²

   = (0.2x)² + 2 × 0.2x × 0.4y + (0.4y)²

   = 0.04x² + 0.16xy + 0.16y²

(ii) (xyz - 2) (xyz + 3) --------------> there is no identity that matches this equation

   = xyz ( xyz + 3) -2 ( xyz + 3)

  = xyz² + 3xyz - 2xyz - 6

  = xyz² + xyz - 6