Algebra

Simplifying Expressions Like terms only can be added or subtracted 4x – 6y – 3x + 7y + 8. 2) 5x² + 9y – 6x + x² - 5 - y = x + y + 8 = 6x² + 8y – 6x – 5 3) ( x + 4 ) (x + 5 ) 4) (3x – 1 ) ( 2x + 6 ) = x ( x + 5 ) + 4 ( x+ 5 ) 3x( 2x + 6 ) – 1 ( 2x + 6 ) = x² + 5x + 4x + 20 6x² + 18x – 2x - 6 = x² + 9x + 20 6x² + 16x - 6

Evaluating Expressions Find the value of 2x² - 5x + 6 when x = 3 2 (3) ² - 5(3) + 6 = 2(9) – 15 + 6 = 9 Evaluate 2x² - 3y when x = -3 and y = 2 2( -3) ² – 3 (2) 18 – 6 = 12

Solving Linear Equations Equations will always have an equal sign 6x – 4 = 2x + 16 5 ( 2x – 4 ) = 3(2x – 1) - 1 6x – 2x = 16 + 4 10x – 20 = 6x – 3 - 1 4x = 20 10x – 6x = 20 - 4 X = 5 4x = 16 x = 4