Squaring both sides of an equation is irreversible. Is cubing both sides of an equation reversible?

Step-by-step explanation:

Well first,

Squaring both sides of an equation is irreversible is not true

You can just put the square root sign () to reverse it...

Same with cubes, as you can just put the cubed root sign () to reverse it...

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