Question

Using suitable identities evaluate the following. 201 mutiplyed by 199

Answer 1

Dear Student,


201 × 199
= (200 + 1) (200 – 1)

= (200)² – (1)² {(a + b) (a – b) = a²– b²}

= 40000 – 1

= 39999


​​​​​​​Regards