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


Practice

Solve for x.
a)    9x2 −6x−4 = 0
1/3 ± 5/3

b)    1x2 +2x−9 = 0
-1 ± 10

c)    -9x2 +8x−1 = 0
4/9 ± 7/9

d)    7x2 −5x−6 = 0
5/14 ± 193/14

e)    -4x2 −x+1 = 0
-1/8 ± 17/8

f)    -4x2 −8x+8 = 0
-1 ± 3

g)    -7x2 +4x+2 = 0
2/7 ± 32/7

h)    -5x2 +4x+3 = 0
2/5 ± 19/5

i)    -2x2 +7x+7 = 0
7/4 ± 105/4

j)    -6x2 +4x+4 = 0
1/3 ± 7/3