Chapter 5 Section 5 Solving Quadratic Equations

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Presentation transcript:

Chapter 5 Section 5 Solving Quadratic Equations Algebra 2 March 6, 2009

Warm-Ups Find the error below. Then factor the equation correctly:

Homework Answers 1) 25) (3x+4)(x+9) 3) x; x(x-2) 26) (x-8)(2x-3) 5) 7y; 7y(2y+1) 31) (x+4)(3x-5) 7) (x+1)(x+2) 32) (y+4)(5y-8) 8) (x+2)(x+3) 40) (2n-5)(2n-5) 13) (x-1)(x-2) 41) (3x+8)(3x+8) 14) (x-12)(x-1) 43) (x+2)(x-2) 19) (x-7)(x+2) 45) (3x+1)(3x-1) 20) (x+5)(x-4)

Solving Quadratic Equations Solving: Finding the x-intercepts Use your graphing calculator: Example 1:

Solving Quadratic Equations Solve by using factoring: Set the equation equal to 0 Example 2: Example 3:

Solving Quadratic Equations Solve using square roots Isolate the squared term! Example 4: Example 5:

Solving Quadratic Equations Different ways the equations can look: Everything on the same side: Factor then solve for x Things on different sides Get everything on the same side then solve for x No ‘b’ term: Use square roots No ‘c’ term: Find the GCF

Homework #36 Page 270 #1, 2, 9, 11, 13, 16, 19, 23, 24 Chapter 5 Test Part 1 Tuesday (Section 5.1 - 5.5)