Question

a – b = 6, ab = 20 find the value of (a + b)²​

Answer 1

Answer:

(a+b)^2 = (a-b)^2 + 4ab

= (6)^2 + 4(20)

= 36 + 80

= 116

hope it helps

Answer 2

Step-by-step explanation:

(a + b)²​ = a²+ b ²– 2ab

⇒ (6)2 = a²​ + b²​ – 2 × 16

⇒ 36 = a²​ + b²​ – 32

⇒ 36 + 32 = a²​ + b²​

⇒ 68 = a²​ + b²​

∴ a²​ + b²​ = 68