Question

if a=71 b=69 apply this identity (a+b)(a-b)

Answer 1

(a + b) (a - b) = a² - b²
= (71)² - (69)² = 5041 - 4761 = 280...

Answer 2

(a+b)(a-b)=a square - b square

71 ka square - 69 ka square
5041-4761
280 answer