abcd Quadratic Equations - Quadratic Formula(L2)
Quadratic Equations - Quadratic Formula(L2)


Practice

Solve for x.
a)    -5x2 +2x+9 = 0
1/5 ± 46/5

b)    7x2 −8x−7 = 0
4/7 ± 65/7

c)    -4x2 −8x+8 = 0
-1 ± 3

d)    8x2 −7x−2 = 0
7/16 ± 113/16

e)    -9x2 +2x+4 = 0
1/9 ± 37/9

f)    4x2 +4x−4 = 0
-1/2 ± 5/2

g)    -2x2 −8x−1 = 0
-2 ± 14/2

h)    -6x2 −8x+7 = 0
-2/3 ± 58/6

i)    -3x2 +8x+4 = 0
4/3 ± 27/3

j)    3x2 +9x+2 = 0
-3/2 ± 57/6