Alfi Blog

Alfi Blog

Alfi Blog


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Factoring Quadratic Polynomials - 5

When the first term is not x2, see if you can factor out the coefficient of x2 If  you can, then you are left with a quadratic whose first term is x2. For example each term in 2x2 + 16x – 18 is divisible by 2:

Adding/Subtracting Fractions

Adding/Subtracting Fractions

When adding fractions with variables in one or more denominators, the LCD will have each variable (or algebraic expression) to its highest power as a factor. For example, the LCD for .

Exponents and Roots

Exponents and Roots

The expression 4x is shorthand for x + x + x + x, that is x added to itself four times. Likewise x4 is shorthand for x · x · x · x—x multiplied by itself four times. In x4, x is called the base and 4 is the power or exponent. We say ‘‘x to the fourth power’’ or simply ‘‘x to the fourth.’’ There are many useful exponent properties. For the rest of the chapter, a is a nonzero number.

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