Question

if x=3 and y=5 and z=7 then x square +y

square +z square-xy-yz-zx​

Answer 1

Answer:

12

Step-by-step explanation:

3×3+5×5+7×7-(3×5)-(5×7)-(7×3)

=9+25+49-15-35-21

=12

Answer 2

Answer:

Value of x²+y²+z²-xy-yz-zx = 12

Step-by-step explanation:

If x=3, y = 5 , z = 7 ,

then the value of x²+y²+z²-xy-yz-zx

= 3²+5²+7²-3×5-5×7-7×3

= 9+25+49-15-35-21

= 83-71

= 12

Therefore,

Value of x²+y²+z²-xy-yz-zx = 12

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