Which of the following is equivalent to the quadratic equation below after completing the square?
x^2+4x=0
a. (x+4)^2=4
b.(x+2)^2=16
c.(x+4)^2=8
d.(x+2)^2=4

idk

step-by-step explanation: i just don't

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204