Question

a^2-b^2=30
a-b=5
a+b=?

Answer 1

(a-b)(a+b)=30

5(a+b)=30

a+b=30/5

a+b=6

Answer 2

a^2-b^2=30

(a-b)*(a+b)=30

5*(a+b)=30

a+b=30/5

a+b=6

Sper ca te-am ajutat