Practice
Solve for x.a) -9x2 −x+9 = 0
-1/18 ± 5/18
-1/18 ± 5/18
b) 2x2 +6x+3 = 0
-3/2 ± /2
-3/2 ± /2
c) 5x2 −5x−5 = 0
1/2 ± /2
1/2 ± /2
d) -5x2 +5x+8 = 0
1/2 ± /10
1/2 ± /10
e) -6x2 +4x+9 = 0
1/3 ± /6
1/3 ± /6
f) 3x2 −3x−4 = 0
1/2 ± /6
1/2 ± /6
g) -9x2 −3x+5 = 0
-1/6 ± /6
-1/6 ± /6
h) 5x2 +9x+1 = 0
-9/10 ± /10
-9/10 ± /10
i) 8x2 +5x−7 = 0
-5/16 ± /16
-5/16 ± /16
j) 8x2 −2x−9 = 0
1/8 ± /8
1/8 ± /8
