Trig: Solve Quadratic Equations by Factoring help with 2b and 2c

Step-by-step explanation:

To factor ax² + bx + c, use the AC method.

(b) 3x² + 11x − 4 = 0

(3x − 1) (x + 4) = 0

3x − 1 = 0, or x + 4 = 0

x = 1/3, or x = -4

(c) 12x² + 8x = 0

Here, you can simply factor the greatest common factor, 4x.

4x (3x + 2) = 0

4x = 0, or 3x + 2 = 0

x = 0, or x = -2/3

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

i do not know the answer

step-by-step explanation: