Answer:
Inverse.
Step-by-step explanation:
The given expression is a case of Existence of Additive Inverse, which states that:
[tex]u + v = 0[/tex], [tex]\forall \,u,v\in\mathbb{R}[/tex]
In other words:
[tex]v = -u[/tex]
In this, we get that [tex]u = 10\cdot k^{2}[/tex] and [tex]v = -10\cdot k^{2}[/tex].
In consequence, the correct answer is "Inverse".
