Question

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

Answer 1

Answer:

by adding both equation

a-b+a+b=4+6

2a=10

a=5

similarly, putting a=5 in eq. a- b=4

5-b=4

5-4=b

b=1

now put value of a and b in,

a²+b²= 5²+1²=25+1=6

similarly, put values in

ab=5×1=5