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


Practice

Solve for x.
a)    -9x2 −x+9 = 0
-1/18 ± 513/18

b)    2x2 +6x+3 = 0
-3/2 ± 3/2

c)    5x2 −5x−5 = 0
1/2 ± 5/2

d)    -5x2 +5x+8 = 0
1/2 ± 185/10

e)    -6x2 +4x+9 = 0
1/3 ± 58/6

f)    3x2 −3x−4 = 0
1/2 ± 57/6

g)    -9x2 −3x+5 = 0
-1/6 ± 21/6

h)    5x2 +9x+1 = 0
-9/10 ± 61/10

i)    8x2 +5x−7 = 0
-5/16 ± 249/16

j)    8x2 −2x−9 = 0
1/8 ± 73/8