8th grade??? math questions help!!?
what are the roots of the equation 2y^2+4=9y
A. 1/2,4
B. -4,2
C. -4,, -1/2
D. -2,4
(explain your answer)
what are the roots of the equation 2y^2+4=9y
A. 1/2,4
B. -4,2
C. -4,, -1/2
D. -2,4
(explain your answer)
Aaron
Favorite Answer
A
Quadratic equation:
2y^2 +4 = 9y (would minus the 9y to the other side to get)
2y^2 - 9y + 4 = 0 (gets you in the perfect set up for quadratic equation)
a = 2
b = -9
c = 4
This will help you calculate it:
http://www.math.com/students/calculators/source/quadratic.htm
This is the actual quadratic equation
http://www.purplemath.com/modules/quadform.htm