Question

Which of the following is the minimum value of the equation

y=3x^2-4x-2

A. -2/3
B.2
C.3
D. -3 3/3

Answer 1

-b/2a is the equation for the axis of symmetry. When you solve for -b/2a, the number you get will be an x-coordinate. Just plug that x value into the equation and solve for y.

Answer 2

I dont know what numbers to put in for -b/2a

Answer 3

Ah, okay. Well, when you get these equations with x^2 in them, they have a general form of ax^2 + bx + c. Basically, your b is the number paired with x and a is the number paired with x^2.

Answer 4

so its -4/2(3)

Answer 5

Almost. B is already -4. So it'd be -(-4)/(2)(3).

Answer 6

it would b 6

Answer 7

be

Answer 8

6 would be the denominator. You'd have 4/6 which reduces to 2/3.

Answer 9

Also, what is option D supposed to be?/ 3 3/3 doesn't look right.

Answer 10

*-3 3/3

Answer 11

-3 1/3

Answer 12

Okay, makes more sense then :3

Answer 13

so its D.

Answer 14

Yep. You get 2/3 once you solve for -b/2a, then once you plug it in you get a y-value of -10/3 or just -3 1/3

Answer 15

thank you

Answer 16

np