Algebra Help - Education Online
Algebra real numbers, formulas, linear and quadratic functions, exponent properties, products and factoring Quadratic Functions
The formula for computing the area of a rectangle is This formula tells you that the area of a rectangle may be found by multiplying its length by its width. For example, the area of a rectangle 5 inches long and 2 inches wide may be found by substituting '5' for 'L' and '2' for 'W' in the formula and then multiplying: A = 5 - 2 = 10 Hence the area of the given rectangle is 10 square inches. If the rectangle is such that the length is the same as the width, the rectangle is called a square, and the formula for its area is
The numeral '2' is called an exponent. The expression 'W2' is a shorthand notation for W - W
The set of all ordered pairs of real numbers (x, y) such that y = x2 is a function. Some ordered pairs that belong to this function are: (0,0) (+1, +1), (-1, +1), (+2, +4), (-2, +4)
The graph of this function is not a line; the function is not a linear function. it is an example of a quadratic function. Its graph is a parabola: Another example of a quadratic function is the set of all ordered pairs of real numbers (x, y) such that y = +2x2 + +5x + -1
If 'a', 'b', and 'c' are real numbers, and 'a' <> 0, then the set of all ordered pairs (x, y) such that y = +ax2 + bx + c is called a quadratic function. The properties of quadratic functions are studied in analytic geometry and calculus.
Continue Algebra Help with ....• Real Numbers • Formulas, Functions, Graphs • Linear Functions • Quadratic Functions • Functions of Higher Degree • Properties of Exponents • Products and Factoring • Quadratic Equations • Solving Problems • Algebra Fundamentals |