# A Complete Course in Algebra for Academies and High Schools

Leach, Shewell & Sanborn, 1885 - 349 sider

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### Innhold

 DEFINITIONS AND NOTATION 1 ADDITION 15 USE OF PARENTHESES 24 DIVISION 36 FORMULÆ 44 FACTORING 51 LOWEST COMMON MULTIPLE 75 SIMPLE EQUATIONS 106
 EVOLUTION 165 THE THEORY OF EXPONENTS 180 PROBLEMS INVOLVING QUADRATIC EQUATIONS 223 EQUATIONS IN THE QUADRATIC FORM 228 THEORY OF QUADRATIC EQUATIONS 246 RATIO AND PROPORTION 255 ARITHMETICAL PROGRESSION 264 GEOMETRICAL PROGRESSION 273

 SIMPLE EQUATIONS CONTAINING Two UNKNOWN 132 XV 144 TITY 158
 LOGARITHMS 287 ANSWERS 307 Opphavsrett

### Populære avsnitt

Side 164 - Arts. 200 and 201 we derive the following rule : Extract the required root of the numerical coefficient, and divide the exponent of each letter by the index of the root.
Side 211 - In any trinomial square (Art. 108), the middle term is twice the product of the square roots of the first and third terms...
Side 44 - ... the product of the two, plus the square of the second. In the third case, we have (a + b) (a — b) = a2 — b2. (3) That is, the product of the sum and difference of two quantities is equal to the difference of their squares.
Side 253 - The first and fourth terms of a proportion are called the extremes; and the second and third terms the means. Thus, in the • proportion a : b = с : d, a and d are the extremes, and b and с the means.
Side 253 - To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus : A : B : : C : D; and read, A is to B as C to D.
Side 44 - The square of the difference of two quantities is equal to the square of the first minus twice the product of the first by the second, plus the square of the second.
Side 288 - ... the logarithm of a fraction is equal to the logarithm of the numerator minus the logarithm of the denominator.
Side 105 - Any term may be transposed from one side of an equation to the other by changing its sign. For, consider the equation x + a = b.
Side 256 - In a series of equal ratios, any antecedent is to its consequent, as the sum of all the antecedents is to the sum of all the consequents. Let a: b = c: d = e:f.
Side 256 - In any proportion the terms are in proportion by Composition and Division; that is, the sum of the first two terms is to their difference, as the sum of the last two terms is to their difference.