Question

Product without multiply directly
93x106

Answer 1

(90+3) (90+16)=
(x+a)(x+b)=x^2+ x(a+b) + ab
(90+3) (90+16)=
90^2+ 90(3+16)+3×16
=8100 + 90(19)+48
=8100+1710+48
=9858 ans


hope it help