Question

If x=1 ,y=5 , z=2 find the value of xy-z+8 plz fast
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Answer 1

Answer:xy+yz-zx=7

Step-by-step explanation:Substituting x=1, y=2 and z=5 in the given expression, we get

xy+yz–zx=(1)(2)+(2)(5)–(5)(1)

=(1×2)+(2×5)–(5×1)

=2+10−5

=12–5

=7

∴xy+yz−zx=7