What quadratic equation has the roots 0 and 3

We must work backwards. When we are given the roots, we take the opposite of the roots, (therefore, we multiply it by -1) and then we combine it with x and multiply it by the other roots. If you're confused, here's an example:
roots 6, -3 and 2:
opposite of 6
-6
(x-6)
opposite of 2
-2
(x-2)
opposite of -3
3
(x+3)
Then we multiply them:
(x-6)(x-2)(x+3)
Then, we would multiply all of those using foil. But, that is just an example.
Here's the real thing:
opposite of 0
-0
(x-0)
using the identity property of addition, this simplifies to 
x
opposite of 3
-3
(x-3)
multiply them:
x(x-3)
Because there is only 1 term on the outside, we don't need to use foil or anything like that. All we have to do is distribute:
x(x)+x(-3)

Now, the question asks for a quadratic equation
if it were asking for a function, we would make that equal to the variable 
y
But, it is asking for an equation.
The way you find roots is that you set the y from the function to 0
So we will do the same and set the expression to 0, making it an equation. Final

sorry it's so long, but I hope I helped!

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c

Answer: v= lwhstep by step explanation: length x width x heightl = 12kmw = 6kmh = 6km12 x 6 = 7272 x 6 = 432therefore your answer would be c) 432 km^3