Question

Find the value of a² + b², when
(i) a+b =9, ab = 20
​

Answer 1

Answer:

a² + b² = 41

Step-by-step explanation:

(a+b)² = a² + b² + 2ab

(9)² = a² + b² + 2 * 20

81 = a² + b² +40

81-40 = a² + b²

41 = a² + b²

Hence , a²+b² is 41