Question

If a+b = 5 and ab = 10, find the value of a2

+b2​

Answer 1

Answer:

5

Step-by-step explanation:

(a + b)2 = a2 + b2 + 2ab

value of a + b = 5

and ab = 10 are given

so

(5)2 = a2 + b2 + 2(10)

25 = a2 + b2 + 20

a2 + b2 = 25 - 20

a2 + b2 = 5