Question

X²(1+y²-2xy)for x=1, y = -2 and z=1​

Answer 1

Answer:

${1}^{2} (1 + {( - 2)}^{2} - 2 \times 1 \times ( - 2)) \\ = 1(1 + 4 + 4) \\ = 9$

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Answer 2

Answer:

+ 4 + 4) \\ = 9\end{gathered}

1

2

(1+(−2)

2

−2×1×(−2))

=1(1+4+4)

=9