Question

(1) the sum of the squares of three numbers is 308, while
the sum of their products taken two at a time is 296.the sum of three numbers is
(1) 20
(2) 22
(3) 28
(4) 30​

Answer 1

Answer:

30

Step-by-step explanation:

let three number be x,y and z

x^2 +y^2+z^2=308

xy + yz + zx = 296

2(xy + yz + zx) = 592

so

(x + y + z)^2 = (x^2 +y^2+ z^2) + 2(xy + yz + zx)

(x + y + z)^2 = 308+592

(x + y + z)^2 = 900

x + y + z = 30

Answer 2

Answer:

PLEASE REFER TO THE ATTACHMENT!