Given:
m = 2 & n = -1
so, m0 - n2
= 2*0 - (-1)*2
= 0 - (-2)
= 0 + 2
= 2
Algebra is a branch of mathematics dealing with symbols and the rules for manipulating those symbols. In elementary algebra, those symbols (today written as Latin and Greek letters) represent quantities without fixed values, known as variables.
A variable is a symbolic name for (or reference to) information. The variable's name represents what information the variable contains. They are called variables because the represented information can change but the operations on the variable remain the same.
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