Quadratic Equations - Quadratic Formula(L2)


Practice

Solve for x.
a)    2x2 +8x+7 = 0
-2 ± 2/2

b)    -1x2 −5x+9 = 0
-5/2 ± 61/2

c)    1x2 +2x−9 = 0
-1 ± 10

d)    9x2 −3x−4 = 0
1/6 ± 17/6

e)    6x2 −3x−8 = 0
1/4 ± 201/12

f)    -2x2 −9x−6 = 0
-9/4 ± 33/4

g)    7x2 +7x−5 = 0
-1/2 ± 321/14

h)    -3x2 −8x+1 = 0
-4/3 ± 19/3

i)    -3x2 −7x+8 = 0
-7/6 ± 145/6

j)    3x2 +3x−7 = 0
-1/2 ± 93/6