Question

if a=2 b=3 and c=4 ,find the value of

1)a square(2)/4+b square(2)/9​

Answer 1

a+b=5 and ab=3

Then (a+b)^2=25

a^2+b^2+2(ab)=25

a^2+b^2=25–6=19

Then (a-b) ^2=a^2+b^2-2(ab) =19–6=13

Then a-b =√13=3.6055