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SS1 Second Term Mathematics Lesson Note – Quadratic Equation II

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WEEK 4

TOPIC: QUADRATIC EQUATION

CONTENT:

  • Revision of linear graph and drawing quadratic graph
  • Obtaining roots from a quadratic graph
  • Finding an equation from a given graph
  • Application of quadratic equation to real life situations

LINEAR GRAPHS

Recall that any equation whose highest power of the unknown is 1 is a linear equation. To draw the graph of a linear equation, we need to

  1. Make a table of value for the equation
  2. Plot the graph of the linear equation

Example: Draw the graph of

Solution;  y = x – 1

-2 0 2
-1 -1 -1
-3 -1 1

Scale:  2cm to 1unit on both axes

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