Algebra
posted by Julie .
7 and 4 the quadratic equation is?
Thank you in advance :)

This makes no sense.
do you mean
(x+7)(x+4)=0 where the roots are 4,7?
FOIL it out. 
x=7 and x=4
x+7=0 and x+4=0
(x+7)(x+4) = x^2 + 4x + 7x +28
the equation would be x^2 + 11x + 28 
correct