Simplify & Evaluate Multivariable Expression: we ADD, SUBTRACT, MULTIPLY or DIVIDE

Example:

            3x²+5y + 2x² – 3y

                  3x^{2 +} 2x²= 5x²

                  5y – 3y = 2y

    Answer:  5x² + 2y

Example:

            2a³– 4a + 5 + 9a – 6b

                Which is same variables: -4a + 9a = 5a

    Answer: 2a³ + 5 + 5a -6b (in order)

Already simplified: 4w – 6t + 2s (constant & different base)

Simplify:

        -7gh + 8g - 2h + 5gh

                 -7gh + 5gh = -2gh

     Answer: -2gh + 8g -2h

Simplify: (Please Excuse My Dear Aunt Sally)

        6x² +2x(x-4y) +3xy

Apply distributive term: 2x(x) 2x(-4y)

            = 2x²  -8xy

            6x² + 2x² = 8x²

            8x² – 8xy +3xy

            -8xy +3xy = -5xy

Answer = 8x² – 5xy