Question

A-b=7 and ab=18 find : a+b

Answer 1

Answer:

a = 9 ,b=2 ,9-2 = 7, 9×2=18,9+2=11

Answer 2

Step-by-step explanation:

a-b=7

a=b+7 (1)

ab=18

from1

b(b+7)=18

b^2+7b=18

b^2+7b-18=0

b^2+9b-2b-18=0

b(b+9)-2(b+9)

b=-9 or b=2

a=16ora=9