x^2 + 2x - 15

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x^2 + 2x - 15 by Mind Map: x^2 + 2x - 15

1. Factor the Quadratic

1.1. (x+5)(x-3)=0

1.1.1. x+5=0

1.1.1.1. x=-5

1.1.2. x-3=0

1.1.2.1. x=3

2. Quadratic Formula

2.1. x=(-b+sqrt(b^2-4ac))/2a

2.1.1. x=(-2+sqrt(2^2-4(1)(-15)))/2(1)

2.1.1.1. x=3

2.2. x=(-b-sqrt(b^2-4ac))/2a

2.2.1. x=(-2-sqrt(2^2-4(1)(-15)))/2(1)

2.2.1.1. x=-5

2.3. a=1, b=2, c=-15

3. Complete the Square

3.1. x^2+2x-15=0

3.1.1. x^2+2x=15

3.1.1.1. (b/2)^2=(2/2)^2=1

3.1.1.1.1. x^2+2x+1=16

4. Graph

4.1. Locate zeroes

4.1.1. x=3

4.1.2. x=-5