Question

(a-b)=8 and ab=3 then (a+b)2 is


a). 48

a). 52

a). 36​

Answer 1

Step-by-step explanation:

Correct option is

C

13

Formula

(a+b)

2

=a

2

+b

2

+2ab

=>a

2

+b

2

=(a+b)

2

−2ab

Given, a+b=5 and ab=6

So, a

2

+b

2

=(a+b)

2

−2ab=5

2

−2×6=25−12=13

Answer 2

Step-by-step explanation:

(a-b)² = a² + b² -2ab

8²= a²+ b² -2×3

64+6 = a²+b²

a²+b²= 70