Question

If x=1,y=2 and z=3,find the value of x²+y²+2xyz.

Answer 1

Answer:

17

Step-by-step explanation:

${x}^{2} + {y}^{2} + 2xyz \\ = {1}^{2} + {2}^{2} + 2(1)(2)(3) \\ = 1 + 4 + 12 \\ = 17$

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