Question

If a+b=2 and a-b=2 then the calue of a2+b2 is:
1) -1
2) 2
3) 4
4) 3/2​

Answer 1

Answer:

4

Step-by-step explanation:

a+b=2 (1)

a-b=2 (2)

Adding (1) and (2)

a+a + b+(-b)=2+2

2a + 0b =4

2a = 4

a = 2

Putting a =2 in (1)

2+b=2

b=0

a^2=4, b^2=0

a^2+b^2=4+0=4

Hence 4 is the answer

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