Question

a^2 + b^2 = 80 and a - b = 4 then find ab=?​

Answer 1

here ur answer

a^2+b^2 = 80

a -b = 4

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

(4)^2= 80 - 2ab

16 = 80 - 2ab

16 - 80 = -2ab

-64 = -2ab

-64/-2 = ab

32 = ab

I hope u got ur answer