1) 4x^2=-4x-1 2) 6x^2-17x+12=0 3)3x^2-7=4x

Question

1) 4x^2=-4x-1
2) 6x^2-17x+12=0
3)3x^2-7=4x

Answer 1

1) 4x^2=-4x-1
4x^2+4x+1=0
D=16-4*4*1=16-16=0
D=0
x=-b/2a
x=-4/8
x=-0,5

2)6x^2-17x+12=0
D=289-4*6*12=289-288=1
x1,2=17+-1/12
x1=4/3;  x2=1,5

2)3x^2-7=4x
3^2-4x-7=0
D=16-4*3*(-7)=16+84=100
x1,2=4+-10/6
x1=-1;    x2=7/3