Question

301 × 298
Formula : x²+( a+b ) X +ab​

Answer 1

Formula is (x+a) (x+b) = x²+(a+b)x+ab

Question is 301 × 298

300+1 × 300-2

(x+a). (x+b)

solution:- = x²+(a+b)x+ab

= (300)²+[1+(-2)]300+1×(-2)

= 90000+(-1)300+(-2)

= 90000-300-2

= 89700-2

= 89698

Answer 2

solution= x2+(a+b)x+ab

question =301×298

(300+1)(300-2)

=300 square+[1+(-2)]300+1(-2)

=90000+(-1)300+(-2)

=90000-300-2

=89698

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