Question

if x=-1,y=2and z=3 find the value of:

xy+yz-zx​

Answer 1

Answer:

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

Answer 2

Answer:

7

Step-by-step explanation:

1. Plug in the missing values. {You should have (-1*2)+(2*3)-(3*-1)}

2. Simplify {-2+6-(-3)}

3. Solve {-2+6=4 // 4- (-3)= 7

Final Answer: 7

Remember: {negative + negative = positive} // {PEMDAS}