Question

. 1) Ifa+b=5 and a-b=13, the value of (a+ba) is (a) 8 (b) 4 (c) 2 (d) 1​

Answer 1

Answer:

Step-by-step explanation:

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

Putting the value of a+b and ab we get,

a^2+b^2=25–6

a^2+b^2=19 *

Now,

(a-b)^2= a^2+b^2–2ab

Putting the value of a^2+b^2=19

We get, (a-b)^2=19–6

a-b= √13, -√13