C.REMEMBER THAT (A+ B)2 = A2+ 2AB+ B2. FROM STATEMENT (1), WE KNOW...

61. c.Remember that (a+ b)

²

= a

²

+ 2ab+ b

²

. From statement (1), we know that a

²

+ b

²

= 13. By cross-multiplying in statement (2), we get 2ab= 12. Since we know the values ofa

²

+ b

²

and 2ab, and(a+ b)

²

= a

²

+ 2ab+ b

²

, we can now take the square root of the sum to find the value ofa+ b.