Question 72

If $$(a^{2}-b^{2})$$ = 81 and (a+b) = 27 then (a-b) will be equal to

Solution

Share

(a+b)(a-b) = $$(a^{2}-b^{2})$$

Therefore the answer is a-b = 81/27 = 3

Create a FREE account and get:

  • Download RRB Study Material PDF
  • 45+ RRB previous papers with solutions PDF
  • 300+ Online RRB Tests for Free