Which of the following is an example of an identity? (1) x' +8 = (x +4)(x+2) (2) 2x+6 = 2(x+6) (3) x' +16 = (x+4)(x+4) (4) x -2x+5 = (x-1)° +4

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.