17. Using the identity a – b = (a + b) (a -b), find the value of (2x + y) – (2x – y).​

1 thought on “17. Using the identity a – b = (a + b) (a -b), find the value of (2x + y) – (2x – y).​”

1. Step-by-step explanation:

   =(2x+y)-(2x-y)

   =2x+y-2x+y

   =2y

   This identity a-b=(a+b)(a-b)

   bcause you used negative sign to subtract

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