if (a-b)=7,ab=23.75 then a+b=?
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Step-by-step explanation:
a-b=7
(a-b)^2=39
ab=23.75
(a+b)^2=(a-b)^2+4ab
(a+b)^2=49+4(23.75)
=49+95
(a+b)^2=144
a+b =12
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