Question

If a - b = 5 and ab = 6, find a + b​

Answer 1

Answer:

the answer is 13

Step-by-step explanation:

(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