Question

if a+b =3 and ab=2 find the value of, a^2+b^2
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Answer 1

$\bold{(a+b)²=a²+b²+2ab}$

$\bold{(3)²=a²+b²+2(2)}$

$\bold{\:a²+b²=9-4}$

$\boxed{\bold{\purple{a²+b²=5}}}$