SOLUTION: In a certain electrical circuit,an engineer found out that the power P can be expressed by the function P=2x^2-60x+480 where x is the current.Can the power of the circuit ever be z

Question 706444: In a certain electrical circuit,an engineer found out that the power P can be expressed by the function P=2x^2-60x+480 where x is the current.Can the power of the circuit ever be zero?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
n a certain electrical circuit,an engineer found out that the power P can be expressed by the function P=2x^2-60x+480 where x is the current.
Can the power of the circuit ever be zero?
:
We can find this out by using the discriminant of this quadratic equation
D =(-60)^2 - 4*2*480
D = 3600 - 3840 = -240, so NO, there are no real roots, cannot equal 0
RELATED QUESTIONS
The Function P=3i^2-2i+450 models the power P in an electric circuit with a current i.... (answered by Fombitz)

In physics class, Taras discovers that the behavior of electrical power, x, in a... (answered by Alan3354)

if the perimeter of a rectangle is expressed by the formula p=2l+2w the side w can be... (answered by stanbon,gonzo)

if the perimeter of a rectangle is expressed by the formula p=21+2w, the side w can be... (answered by JimboP1977,dabanfield)

if the perimeter of a rectangle is expressed by the formula p=2l + 2w, the side w can be... (answered by jim_thompson5910)

If the perimeter of a rectangle is expressed by the formula p=2l+2w, the side w can be... (answered by richwmiller)

The current I that flows through an electrical appliance is determined by I = square... (answered by Nate)

Optimization The power absorbed by a circuit is p(x) = ((V^2)x)/(R+x)^2 where R is the (answered by Fombitz)

The pressure of the oil in reservoir tends to drop with time. By taking sample pressure... (answered by josmiceli)