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


Practice

Solve for x.
a)    7x2 +7x−5 = 0
-1/2 ± 321/14

b)    -2x2 −8x−4 = 0
-2 ± 2

c)    -9x2 −x+6 = 0
-1/18 ± 217/18

d)    6x2 −8x−1 = 0
2/3 ± 22/6

e)    9x2 −4x−9 = 0
2/9 ± 85/9

f)    2x2 +8x−1 = 0
-2 ± 32/2

g)    -8x2 −2x+5 = 0
-1/8 ± 41/8

h)    -5x2 +x+5 = 0
1/10 ± 101/10

i)    1x2 +5x−5 = 0
-5/2 ± 35/2

j)    -3x2 +6x+5 = 0
1 ± 26/3