Question

if a + b equals to 9 and a b equals to 10 find values of a square + b square​

Answer 1

Step-by-step explanation:

(a+b)^2=a^2+b^2+2ab

9*9=a^2+b^2+2*10

81=a^2+b^2+20

a^2+b^2=81-20=61