Question

If a-b=7and ab =10find a+b

Answer 1

Step-by-step explanation:

ab= 10

a= 10/ b

a-b = 7

10/b - b = 7

take lcm,

10 - b^2 / b = 7

10 - b^2 = 7b

0= b^2+7b-10

solve the quadratic equation and you will get the answer.