document.write( "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? \n" ); document.write( "

Algebra.Com's Answer #435172 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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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.
\n" ); document.write( "Can the power of the circuit ever be zero?
\n" ); document.write( ":
\n" ); document.write( "We can find this out by using the discriminant of this quadratic equation
\n" ); document.write( "D =(-60)^2 - 4*2*480
\n" ); document.write( "D = 3600 - 3840 = -240, so NO, there are no real roots, cannot equal 0 \n" ); document.write( "

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