Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not.

Answer 1

I assume you meant x^2 - y = 7

let's sub in the given point

Left Side = (-2)^2 - (-3)
= 4 + 3
= 7

Right Side = 7

Mmmhh, what do you think?

Answer 2

I think that makes sense, although I used 2 computer based calculators that told me the solution was -1. So the annswer is 7 and solution is a true statement.

Answer 3

- (-3) = + 3
I think you probably told the calculator 4 - 3 = 1 but it is 4 -(-3) = 4+3 = 7

Answer 4

Got it! Thanks!