# New University Algebra: A Theoretical and Practical Treatise, Containing Many New and Original Methods and Applications. For Colleges and High Schools

Ivison, Phinney, Blakeman, & Company, 1864 - Algebra - 420 pages
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### Contents

 Reduction 06 66 Addition 74 Reduction of Complex Forms 81 Definitions 83 Reduction of Simple Equations 89 Two Unknown Quantities 103 Three or more Unknown Quantities 118 General Solution of Problems 124 Discussion of Problems 130 Interpretation of Anomalous Forms 136 Inequalities 145 SECTION III 151 Powers of Polynomials 157 Square Root of Polynomials 164 Cube Root of Polynomials 172
 Examples of Simultaneous Equations 243 Discussion of the Four Forms 250 Problems producing Quadratic Equations 258 SECTION VI 265 Problems in Proportion 274 Examples of Permutations and Combinations 283 The Ten Cases 290 Problems 298 Decomposition of Rational Fractions 306 Exponential Equations 357 Commensurable Roots 370 _Synthetic Division 392 Rule of Des Cartes 400 Limiting Equation 408

### Popular passages

Page 204 - ... the product of the two, plus the square of the second. In the third case, we have (a + b) (a — 6) = a2 — b2. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares.
Page 36 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
Page 61 - To reduce a fraction to its lowest terms. A fraction is in its lowest terms, when the numerator and denominator are prime to each other.
Page 396 - VARIATIONS of sign, nor the number of negative roots greater than the number of PERMANENCES. 325. Consequence. When the roots of an equation are all real, the number of positive roots is equal to the number of variations, and the number of negative roots is equal to the number of permanences. For, let m denote the degree of the equation, n the number of variations of the signs, p the number of permanences ; we shall have m=n+p. Moreover, let n' denote the number of positive roots, and p' the number...
Page 173 - Multiply the divisor, thus increased, by the last figure of the root; subtract the product from the dividend, and to the remainder bring down the next period for a new dividend.
Page 359 - From this we might conclude that every equation involving but one unknown quantity, has as many roots as there are units in the exponent of its degree, and can have no more.
Page 72 - Reduce compound fractions to simple ones, and mixt numbers to improper fractions ; then multiply the numerators together for a new numerator, and the denominators for. a new denominator.
Page vii - Fractional exponents are used to denote both involution and evolution in the same expression, the numerator indicating the power to which the quantity is to be raised, and the denominator the required root of this power. Thus, the expression a* signifies the 4th root of the 3d power of a, and is equivalent to Va'.
Page 31 - The square of the sum of two quantities is equal to the square of the first, plus twice the product of the first and second, plus the square of the second.
Page 93 - Divide 48 into two such parts, that if the less be divided by 4, and the greater by 6, the sum of the quotients will be 9. Ans. 12 and 36. 11. An estate is to be divided among 4 children, in the following manner : The first is to have \$200 more than 1 of the whole.