Question

If a + b + c = 7 and ab + bc + ca = 12
then the value of a^2 + 5^2 + c^2 is
25
5
Ο Ο Ο Ο
125
625​

Answer 1

Answer:

don't now

Step-by-step explanation:

sorry bro don't know

Answer 2

Answer:

9

Step-by-step explanation:

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

(a+b+c)^2=a^2+b^2+c^2(ab+bc+ca)

(7)^2=a^2+b^2+c^2+2*20

49=a^2+b^2+c^2+40

49-40=a^2+b^2+c^2

9=(a+b+c)^2