albinasaryeva albinasaryeva

26-02-2017
Mathematics

Answered

If a+b=s and a-b=t, then which of the following expresses the value of ab in terms of s and t?

Verified Answer :

bobbbbkkk bobbbbkkk

26-02-2017

(s^2-t^2)/4
because s^2=A^2+2ab+B^2
t^2=A^2-2ab-B^2
so it is easy to caculate

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