Question

x power 2 + 5 power 2 + Z power 2 + xy + Y Z plus ZX is 43 when x x value is equals to 4 Y is equals to minus 6 and Z = 5

Answer 1

x² + 5² + z² + xy + yz + zx = 43
x = 4y = -6
z = 5
y = -6/4 = -1.5

(-6)² + (5)² + (5)² + (-30) + (25) + (-30)
36 + 25 + 25 - 30 + 25 - 30
6 + 20 + 25
45 + 6
51.


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