Question

if a+b+c= 25, ab+bc+ca=45 find the value of a²+b²+c²​

Answer 1

Answer:

a²+b²+c²=535

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2(ab+bc+ca)

(25)²= a²+b²+c²+2(45)

625-90=a²+b²+c²

a²+b²+c²=535