a + b, I think of two numbers and add them together., 2a, I think of a number and double it., a2, I think if a number and multiply it by itself. , 2a + 1 , I think of a number, double it and add 1., 3a, I think of a number and treble it., 2(a + 1), I think of a number, add one and then double it..

Algebra Notation

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