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mathematicsprinted 36 · PDF 37
165 pagesrevision 46935
printed 36 · PDF 37
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36
2x and 3y (different letters)
2x2 and 3x4 (different powers)
2xy and 3xyz (different letters)
4(x + y) and 5(x + y)2 (different powers)
Remember multiplication can be done in any order
xy and yx are like terms
Add the COEFFICIENTS of like terms
If the answer is a positive answer then put "+" in front if there are other terms before
it
x - 2y + 5y = x + 3y
If the answer is a negative number then put "-" in front
x - 5y + 2y = x - 3y
2.6 Inequalities Notes
1. Understanding Inequalities
An inequality compares two values and shows the relationship between them.
Common symbols:
< less than
> greater than
≤ less than or equal to
≥ greater than or equal to
2. Types of Inequalities
Linear inequalities
Quadratic inequalities
3. Solving Linear Inequalities
Step 1: Isolate the variable (similar to solving equations).
Step 2: If you multiply or divide by a negative number, reverse the inequality sign.
4. Solving Quadratic Inequalities
Step 1: Factor the quadratic expression (if possible).