SOLUTION: If z and y are negative integers and x - y = 1, what is the least possible value for xy?

Algebra ->  Expressions-with-variables -> SOLUTION: If z and y are negative integers and x - y = 1, what is the least possible value for xy?      Log On


   



Question 937862: If z and y are negative integers and x - y = 1, what is the least possible value for xy?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x - y = 1
y <= -1
z <= -1
---
put the system of linear equations into standard form
---
x - y = 1
y = -1
z = -1
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = 0
y = -1
z = -1
---
answer:
xy = 0 * (-1) = 0
notice that the value of z is irrelevant to this problem
---
check:
y = -2
x - y = 1
x = 1 + y
x = 1 - 2
x = -1
xy = (-1)(-2)
xy = 3
so the answer above is correct
---
Free algebra tutoring live chat:
https://sooeet.com/chat.php?gn=algebra
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations with quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
---