Question

find (a+b) (a-b) then a2+b2=32 and ab=15

Answer 1

Answer:

as. (a+b)²=a²+b²+2ab

(a+b)²=32+30

(a+b)=√62

and. (a-b)²=a²+b²-2ab

(a-b)²=2

(a-b)=√2

to find (a+b)(a-b)=√2×√62

=11.1