1) Х^2-7х +12 =0(х-3)(х-4) = 0x1 = 3x2 = 4
2) 5х^2-3x-2=0(5x+2)(x-1) = 0x1 = -2/5x2 = 1
3) 3x^2+7x+4=0(3x+4)(x+1) = 0x1 = -4/3x2 = -1
4) 2x^2+x+3=0This quadratic equation has no real roots.
5) 4x^2-12x+9=0(2x-3)^2 = 0x = 3/2
1) Х^2-7х +12 =0
(х-3)(х-4) = 0
x1 = 3
x2 = 4
2) 5х^2-3x-2=0
(5x+2)(x-1) = 0
x1 = -2/5
x2 = 1
3) 3x^2+7x+4=0
(3x+4)(x+1) = 0
x1 = -4/3
x2 = -1
4) 2x^2+x+3=0
This quadratic equation has no real roots.
5) 4x^2-12x+9=0
(2x-3)^2 = 0
x = 3/2