# Algebra II For Dummies by Mary Jane Sterling

By Mary Jane Sterling

Along with being a huge zone of math for daily use, algebra is a passport to learning matters like calculus, trigonometry, quantity conception, and geometry, simply to identify a couple of. to appreciate algebra is to own the ability to develop your talents and data so that you can ace your classes and probably pursue additional research in math.
Algebra II For Dummies is the thrill and straightforward solution to get a deal with in this topic and clear up even the trickiest algebra difficulties. This pleasant advisor exhibits you the way to wake up to hurry on exponential capabilities, legislation of logarithms, conic sections, matrices, and different complex algebra ideas. very quickly you’ll have the instruments you would like to:<ul type="disc">* Interpret quadratic services* locate the roots of a polynomial* cause with rational services* divulge exponential and logarithmic features* chop up conic sections* remedy linear and non linear platforms of equations* Equate inequalities* Simplifyy advanced numbers* Make strikes with matrices* deal with sequences and sets
This hassle-free advisor deals lots of multiplication tips that purely math academics recognize. It additionally profiles distinctive varieties of numbers, making it effortless so that you can categorize them and clear up any difficulties with no breaking a sweat. in terms of knowing and dealing out algebraic equations, Algebra II For Dummies is all you must be successful!

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Extra info for Algebra II For Dummies

Example text

If a < b, a – c < b – c (subtracting any number). ߜ If a < b, a ⋅ c < b ⋅ c (multiplying by any positive number). ߜ If a < b, a ⋅ c > b ⋅ c (multiplying by any negative number). b ߜ If a < b, a c < c (dividing by any positive number). b ߜ If a < b, a c > c (dividing by any negative number). b c d ߜ If a c < d , a > b (reciprocating fractions). You must not multiply or divide each side of an inequality by zero. If you do so, you create an incorrect statement. Multiplying each side of 3 < 4 by 0, you get 0 < 0, which is clearly a false statement.

The best way to explain this is to demonstrate the factoring by grouping on x3 – 4x2 + 3x – 12 and then on xy2 – 2y2 – 5xy + 10y – 6x + 12. The four terms x3 – 4x2 + 3x – 12 don’t have any common factor. However, the first two terms have a common factor of x2, and the last two terms have a common factor of 3: x3 – 4x2 + 3x – 12 = x2(x – 4) + 3(x – 4) Notice that you now have two terms, not four, and they both have the factor (x – 4). Now, factoring (x – 4) out of each term, you have (x – 4)(x2 + 3).

The equation 6x2 = 96 doesn’t strictly follow the format for the square root rule because of the coefficient 6, but you can get to the proper form pretty quickly. You divide each side of the equation by the coefficient; in this case, you get x2 = 16; now you’re in business. Taking the square root of each side, you get x = ± 4. Dealing with radical square-root solutions The choice to use the square root rule is pretty obvious when you have an equation with a squared variable and a perfect square number.