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