Practice
Solve for x.a) 2x2 +8x+7 = 0
-2 ± /2
-2 ± /2
b) -1x2 −5x+9 = 0
-5/2 ± /2
-5/2 ± /2
c) 1x2 +2x−9 = 0
-1 ±
-1 ±
d) 9x2 −3x−4 = 0
1/6 ± /6
1/6 ± /6
e) 6x2 −3x−8 = 0
1/4 ± /12
1/4 ± /12
f) -2x2 −9x−6 = 0
-9/4 ± /4
-9/4 ± /4
g) 7x2 +7x−5 = 0
-1/2 ± 3/14
-1/2 ± 3/14
h) -3x2 −8x+1 = 0
-4/3 ± /3
-4/3 ± /3
i) -3x2 −7x+8 = 0
-7/6 ± /6
-7/6 ± /6
j) 3x2 +3x−7 = 0
-1/2 ± /6
-1/2 ± /6