Question

if a+b=2 and ab=1 then a=?​

Answer 1

Answer:

a=1.....................

Answer 2

Step-by-step explanation:

since a+ b = 2

therefore b = 2 -a

substituting value of b in ab=1

therefore a (2-a)=1

2a-a²=1

a²-2a+1=0

a²-1a-1a+1=0

a(a-1)-1(a-1)=0

a-1=0

therefore a=1