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simultaneous and quadratic equations.
- INEQUALITIES
- An inequality is an algebraic statement involving the symbols >,
<, ≥ or ≤
- If x<2 There are infinitely many values that x could
have. It can be shown on a number line like the one below.
- On a number line if the circle is
hollow it means that its not equal to
the number and if the circle is filled in
it means that it could also be the
number its on.
- An inequality is an algebraic statement involving the symbols >,
<, ≥ or ≤
- When there is a pair of equations one is
usually quadratic and the other is
linear.
- Equation 1: 2x + y = 7
Equation 2: 3x - y = 8
- 2x + y = 7
3x - y = 8
------------
5x = 15 x =
3
- Now you can put x = 3 in
either of the equations.
Substitute x = 3 into the
equation 2x + y = 7: 6 + y = 7 y
= 1 So the answers are x = 3
and y = 1
- You can also show it in a graph
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