Question

if you don't know the answer please don't give if you know the answer please give the answer please plz plz ​

Answer 1

Answer:

Step-by-step explanation:

9x^2+25y^2=181

(3x)^2+(5y)^2=181

Now we know that, (a+b)^2=a^2+b^2+2ab

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

by using this formula

(3x+5y)^2-2.3x.5y=181

by substituting the value,

(3x+5y)^2= 1

(3x+5y)=√1

=1