Question

If a+b=9 and a^2+b^2 =52 find the value of ab

Answer 1

Answer:

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Answer 2

Answer:

a+b=9

(a+b)^2=9^2

a^2+b^2+2ab=81

since a^2+b^2=52

so 52+2ab=81

2ab=81-52

so ab=29/2