Solving Quadratics ~ All Methods

Factoring

100

x^2-10x+21=0

x={3,7}

200

3x^2-13x=30

x={-5/3,6}

300

2x^2=x+21

x={-3,7/2}

400

When is it best to use factoring?

When the equation is factorable, meaning you can find two factors that multiply to get your "a x c" and add to get your b.

Square Roots

100

5x^2-11=234

x=+-7

200

x^2-1=39

x=+-2sqrt10

300

-2x^2-196=0

x=+-7isqrt2

400

When is it best to solve using square roots.

When there is no clear a, b, or c

Quadratic Formula

100

-2x^2+3x=4x-15

x={-3,5/2}

200

x^2-9=4x

x={2+-sqrt13}

300

-3x^2+8x-7=0

x={(4+-isqrt5)/3}

400

When is it best to solve using the Quadratic Formula?

When something is not factorable, Quadratic Formula ALWAYS works.

Random

100

What school does Ms. Lopez teach at?

Etiwanda High School

200

What is the name of Mr. Krabs' enemy?

Plankton

300

Who performed at the Super Bowl this year?

Rihanna

400

Name the 6 Infinity Stones that Thanos and the Avengers try to find.

Soul Stone (Orange), Space Stone (Blue), Time Stone (Green), Mind Stone (Yellow), Reality Stone (Red), Power Stone (Purple)