Question

Help!!
Which of the following is the maximum value of the equation y=-2x^2-3x+4
a. 5 1/8
b. 1 3/4
c. - 3/4
d. 5/8

Answer 1

max is found at the second coordinate of the vertex
the first coordinate of the vertex of \(y=ax^2+bx+c\) is \(-\frac{b}{2a}\)
the second coordinate is what you get when you plug in the first coordinate

Answer 2

This is how i tried working it out

Answer 3

Is that right? @satellite73

Answer 4

what is it?

Answer 5

- a/2b That is the formula

Answer 6

i am sorry i mean - b/2a

Answer 7

@satellite73