Find the value of: {(798 + 579)^2 —(798 —579)^2 }/(798\times579)

Postal or Sorting Assistants Model Paper 8 With Solutions

Question : 18 of 100

Marks: +1, -0

Find the value of:

{(798 + 579)^2 —(798 —579)^2 }/(798×579)

Solution:

{(798+579)^2 -(798- 579)^2}/{(798+579)}

⇒

{(798)^2 + (579)^2 + 2 × 798 × 579 -(798)^2 - (579)^2 + 2 × 798 × 579}/{798×579}

⇒

{4×798×579}/{798×579}

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