Question

If ab + bct ca = 8, a + b ² + c ² = 84
Then Carb+c) 2
a) 121
6) 100
c) 95
d) 68​

Answer 1

Answer:

100

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2(ab+bc+ca)

(a+b+c)²=84+2(8)

(a+b+c)²=84+16

(a+b+c)²=100

Hope this helps