Question

if a+b=10 and ab=15,Find the value of a2+b2​

Answer 1

${a}^{2} + {b}^{2} = a + b + 2ab \\ = 10 + 2 \times 15 \\ = 40$

Answer 2

Answer:

$\sf\begin{gathered} {a}^{2} + {b}^{2} = a + b + 2ab \\ = 10 + 2 \times 15 \\ = 40\end{gathered}$