macdealbashiru macdealbashiru

05-06-2020
Mathematics

contestada

If a+b = 7, and a² +b²=25
then ab = ?

Respuesta :

sayersharma8 sayersharma8

05-06-2020

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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