Question

If a - b = 5 and ab = 6, find a + b.​

Answer 1

Answer:

a+b=7 , -7

Step-by-step explanation:

a-b=5

a=b+5

ab=6

(b+5)×b=6

b²+5b=6

b²+5b-6=0

b²+6b-b-6=0

b(b+6)-1(b+6)=0

(b-1) (b+6)=0

b=1,-6

For b=1

a=6

a+b=7

For b=-6

a=-1

a+b=-7