Question

2.Ifabis10anda+bis7thenthevalueof

(a²+b²)is...................​

Answer 1

$\sf \pink{ \underline{answer \ : 29}}$

Answer 2

${(a + b)}^{2} = {a}^{2} + 2ab + {b}^{2}$

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$

${a}^{2} + {b}^{2} = {(a + b)}^{2} - 2(ab)$

given, ab = 10 and a+b = 7

= 7²-2(10)

= 49-20

29 is the right answer..