Question

If x + y + z = 5, xy + y2 + zx=10, then find the value of x2+y2+z2​

Answer 1

Answer:

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

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

(5)^2=x^2+y^2+z^2+(10)

x^2+y^2+z^2=25-10

x^2+y^2+z^2=15

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Step-by-step explanation: