a+b=5,ab=2 find a square +brackets square =?
Chikuπ:
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Given, ab=2
a+b=5
(a+b)^2=a^2+b^2+2ab
(5)^2=a^2+b^2+2(2)
a^2+b^2= 25-4
=21
Your answer is 21
a+b=5
(a+b)^2=a^2+b^2+2ab
(5)^2=a^2+b^2+2(2)
a^2+b^2= 25-4
=21
Your answer is 21
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