3 years ago

If a+b = 7, and a² +b²=25then ab = ?

Mathematics

1 answer:

Rama09 [41]3 years ago

3 0

a2+b2=25

or, (a+b)^2-2ab=25

or, (7)^2-2ab=25 [a+b=7]

or, 49-25=2ab

or, 24/2=an

•°• ab=12....

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If a+b = 7, and a² +b²=25then ab = ?​

If a+b = 7, and a² +b²=25then ab = ?