3­2.2 eqns by factoring day 2.notebook October 10, 2018

1) Solve x2 ­ 4x ­ 21 = 0

2) Solve x2 + 30 = 11x

Warm up I can solve a quadratic equation by factoring.

how are these different from

yesterday? how are they

similar?

3) Solve x(x ­ 11) = ­18

4) Find the zeros of f(x) = x2 + 13x + 40

Ex 1: 7a2 ­ 50a + 7 = 0

Ex 2: 4b2 ­ 8b ­ 5 = 0

Ex 3: Solve ­2m2 + 19m = 24

Ex 4: Solve 0.2x2 ­ 0.3x ­ 3.5=0

~ When can we multiply through by any number we want to?

3­2.2 eqns by factoring day 2.notebook October 10, 2018

How do we solve quadratic equations by factoring special products?

16m2 ­ 81 = 0

2) ­36n2 + 1 = 0

196n2 + 64 = 224n

Solve by setting the problem equal to zero and dividing through by the GCF.

challenge!

Practice~ "Factoring Trinomials when a>1" ws (front page only)

I can solve quadratic equations by factoring.

3­2.2 eqns by factoring day 2.notebook October 10, 2018