Question

if a-b = 4 and a+b = 6 find :
i) a² + b²
ii) ab​

Answer 1

Answer:

1) 26

2)5

Step-by-step explanation:

a=b+4

a+b=6

b+b+4=6

2b=2

b=1

a=5

1)5×5+1×1

=25

2)5×1=5

Answer 2

Answer:

Step-by-step explanation:

Given,

a-b=4 -------------(1)

a+b=6 ------------(2)

Add (1) and (2)

a-b=4

a+b=6 (b get cancelled)

2a=10

a=5

At a=5 in eqn (1)

5-b=4

-b=4-5

-b=-1

b=1

Now

i) (1)^2^ + (5)^2^

1+25=26

26 Ans.

ii) (1)(5)

5 Ans.