Solving Absolute Value Equations October 2, 2014 SWBAT: Solve Absolute Value Equations.

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Presentation transcript:

Solving Absolute Value Equations October 2, 2014 SWBAT: Solve Absolute Value Equations

Eliminate C&D, b/c those are not for “or”! Elimante B b/c the circles are open !

SWBAT: Solve Absolute Value Equations 5 5 0

-6,6 -4,16 -5,3 No solution!

SWBAT: Solve Absolute Value Equations Isolate the Absolute Value Set up 2 equations Solve Check

SWBAT: Solve Absolute Value Equations 2x – 3 = 17or 2x – 3 = x = x = 10 2x = x = CHECK

SWBAT: Solve Absolute Value Equations 4x – 2 = 10or 4x – 2 = x = x = x = x = -2 CHECK

SWBAT: Solve Absolute Value Equations Isolate the abs. value first No solution!

2x + 5= x + 4 or 2x + 5 = -(x + 4) -x x + 5 = x = -1 2x + 5 = -x - 4 +x 3x + 5 = x = x = -3 CHECK

4 – x = 3xor 4 – x = -3x +x 4 = 4x = x +x 4 = -2x = x Reject CHECK x

Isolate the abs. value first y – 4 = 3y + 6 or y - 4 = -(3y + 6) -y -4 = 2y = 2y = y y – 4 = -3y y 4y - 4 = - 6 4y = CHECK Reject x

x + 6 = 2x + 18 or x + 6 = -(2x + 18) -6 6 = x = x x + 6 = -2x x +2x 3x + 6 = -18 -x 3x = x = -8 Isolate the abs. value first CHECK x Reject

SWBAT: Solve Absolute Value Equations

4n + 8 = 16or 4n + 8 = n = n = n = n = -6 CHECK