Question

1) Sum
$103 \times 98$
Formula :-
$(x + a)(x + b) = x {}^{2} + (a + b)x + ab$
Answer :- (100 + 3) (100 – 2) = (100)2 + (3 – 2) (100) + 3 × (-2) = 10000 + 100 – 6 = 10100 – 6 = 10094
$doubt \: ofanswer$
It is answer of this sum?
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Answer 1

Answer:

Yes, the given answer and it's solution method is correct.