Question

Evaluate using suitable idetities; 95×97

Answer 1

= (100 - 5)(100-3)   ●  (x+a)(x+b) = x ^(2) + (a+b)x + (a)(b)   = (100)^(2) +[(-5)+(-3)] ×100 + (-5)(-3) = 10000 - 800 + 15 = 9200 + 15  = 9215