If $x=1,\ y=2$ and $z=5$, find the value of $xy+yz-zx$.

Given: $x=1,\ y=2$ and $z=5$

To do: To find the value of $xy+yz-zx$.

Solution:

$xy+yz-zx$

$=1\times2+2\times5-5\times1$

$=2+10-5$

$12-5$

$=7$

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Updated on: 10-Oct-2022

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