Question

if a-b=6 and a+b=5 then find the value of a2-b2???​

Answer 1

Answer:

Step-by-step explanation:

a+b=5. a-b=6

a=5-b  

substitute a=5-b in a-b=6

a-b=6

5-b-b=6

5-2b=6

5-6=2b

-1=2b

b=-1/2

a+b=5

a-1/2=5

a=5+1/2

a=11/2

then a2+b2=

=11/2×2+(-1/2×2)

11+(-1)

10is the answer

Answer 2

a2-b2= (a+b) (a-b)

= 5×6

=30(ans)

Hope it help u.... dear..