Solve the quadratic equation: 3x2 − 2x − 8 = 0

Solutions 

Factor 3x²−2x−8

1. Multiply 3 by -8, which is -24.

2. Ask: Which two numbers add up to -2 and multiply to -24?

3. 4 and -6

4. Rewrite −2x as the sum of 4x and −6x: 



Factor out common terms in the first two terms, then in the last two terms 

 

 Factor out the common term 3x+4 

 

Solve for x

1. Ask: When will (3x+4)(x−2) equal zero?

2. When 3x+4=0 or x−2=0.

3. Solve each of the 2 equations above: 

x = −4 / 3,2

How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%