Question

a-b=2,ab=11.25 then a+b= ?​

Answer 1

Answer:

Step-by-step explanation:

a-b=2

ab=11.25

we know that,

(a-b)²=a²+b²-2ab

(2)²=a²+b²-2*11.25

4=a²+b²-22.5

a²+b²=4+22.5

        =26.5

(a+b)²=a²+b²+2ab

         =26.5+2*11.25

         =26.5+22.5

         =49

a+b=√49

      =7

Answer 2

Answer:

Step-by-step explanation:

ab=11.25

a=11.25/b

substituing a in a-b=2

11.25/b-b=2

b^2-2b-11.25

after solving equation we get

b=2.5