Equations, Inequations and systems

Equations, Inequations and systems

1. Biquadratic equations

   • x4=z2 x2=z
     • x=+-√z

2. equations with x in the denominator

   • multiply the numerator by the least common multiple
     • check all the sollutions

3. equations with radicals

   • eliminate the root by isolating it and squaring it
     • check all the sollutions

4. exponential equations

   • the unknown is in the exponent
     • the bases/exponents must be equal

5. logarithmic equations

   • the unknown is in a logarithmic expression

6. (...) . (...) . (...) = 0

   • We need a parentheses to present an equation we know how to solve

7. Non linear equations

   • The unkwnown is squared
     • check all sollutions

8. inequations

   • they are equations inequalities which are solved by multiplying or dividing a negative number and changing its solutions