how to solve
103*97
with the formula(a+b)(a-b)
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4
103*97 can also be written as,
(100+3)(100-3)
here we will use the identity
(a+b)(a-b)=a²-b²
(100)²-(3)²
10000-9
9991 is the answer
(100+3)(100-3)
here we will use the identity
(a+b)(a-b)=a²-b²
(100)²-(3)²
10000-9
9991 is the answer
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