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Oliver
07-11-2013, 05:27 PM
SAT math Quadratic Equation

How can we find the value of the parameter m if it's known that 3 is a root of the following quadratic equation:

2x^2+3x+m=0

Thanks!!:D

kadence
07-11-2013, 05:31 PM
SAT math Quadratic Equation

Since 3 is a root of the following equation:

2x^2+3x+m=0

you have to replace x with 3 and then solve for m

2(3^2)+3(3)+m=0

18+9+m=0

m=-27

Hope these help!:D:D

kadence
07-11-2013, 05:33 PM
Thank you kadence!!