Question 105194
4x^2+x-3=0
x^2+x/4-3/4=0 divide both sides by 4.
x^2+x/4    =3/4 
x^2+x/4+1/64=3/4+1/64 divide the 2nd term coefficient by 2 and square it and add it to both sides.
(x+1/8)^2=49/64 factor
x+1/8=+-7/8 square root of each side.
x=-1/8+-7/8
x=3/4, x=-1
you shouldn't have any problem doing the other 2.
Ed