Question

a^2+b^2=45, a+b=9,then a-b?

Answer 1

Your answer will be √81=9 .

Find the value of 2ab from the first equation and then put its value in the second equation.

Answer 2

a square+b square=45

ie, 6 square+3 square=45

36+9=45

45=45

a+b=9

6+3=9

9=9

a-b

6-3=3

Therefore a=6

b=3