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Basic Algebra (Evaluating Expressions (Evaluate a Variable Expression…

- - - - Like Terms
        
        terms that have the same variables which have the same exponents (raised to the same powers)
      - Coefficient
        
        A constant that multiples a variable, i.e. 2 in 2n, or -1 in -x (as multiplied by -1 is a given for x)
      - Combining like terms
        
        Collect like terms
        
        i.e 4x+5x-x
        ^2 + y+4x^2 +10
        becomes
        9x+3x^2+y+10
        
        2ab-3a^2 b+4-5ab+6ab^2+2a^2 b+2
        Becomes
        6-ab(a – b - 6b + 3)
- - - - Slope (m) is the rate of change or gradient
      - Intercept (B) is where it cross the Y axis
  - - - for two unknows, add the eqations, emilinate Y and then use the result of y in one of the first equations to get the intercept
        
        x-y =2 & 2x+y = 2
        
        2x+y+x-y = 4
        
        3x=4
        
        x = 4/3
        
        4/3-y =2
        
        1 more item...
    - - when you have two or more equations using the same variables
      - The solution is the point that satisfies ALL the equations. This point is an ordered part (x,y)