1 Warm Up Solve by factoring 𝑥 2 −8𝑥−3=0

2 2.4 Completing the Square Objective: To complete a square for a quadratic equation and solve by completing the square

3 Steps to complete the square1.) You will get an expression that looks like this: AX²+ BX 2.) Our goal is to make a square such that we have (a + 𝒃 𝟐 )² = a² +2ab + b² 3.) We take ½ of the X coefficient (Divide the number in front of the X by 2) 4.) Then square that number

4 To Complete the Square x2 + 6x3 Take half of the coefficient of ‘x’ Square it and add it 9 x2 + 6x + 9 = (x + 3)2

5 Complete the square, and show what the perfect square is:

6 To solve by completing the squareIf a quadratic equation does not factor we can solve it by two different methods 1.) Completing the Square (today’s lesson) 2.) Quadratic Formula (Next week’s lesson)

7 Steps to solve by completing the square1.) If the quadratic does not factor, move the constant to the other side of the equation 2.) Work with the x²+ x side of the equation and complete the square by taking ½ of the coefficient of x and squaring 3.) Add the number you got to complete the square to both sides of the equation 4.)Simplify your trinomial square 5.)Take the square root of both sides of the equation 6.) Solve for x

8 Solve by Completing the Square+9

9 Solve by Completing the Square+121