exam Maths Puzzle Numerical Ability

What is "restriction" in regards to an equation?

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exam Other Question

A. Create matrix A such that a11=4, a12=6, a21=0, and a22=-1.
B. What is the additive inverse of A?

p.s. a11= an a with the 11 written like the opposite of a^11 Can you help me factor 25a^2-16 please thanks