Question

Find a² +b² when a+b= 3 and
ab=-10​

Answer 1

Answer:

19

Step-by-step explanation:

(a+b)²=a²+b²+2ab

(3)²=a²+b²+2*ab

9=a²+b²+2*-10

9=a²+b²-10

9+10=a²+ b²

19=a²+b²

Answer 2

Ans.

(a+b)²=a²+2ab+ b²

(3)²=a²+2(-10)+b²

9=a²+(-20)+b²

9+20=a²+b²

29= a²+b²