Practice
Solve for x.a) 4x2 +2x−1 = 0
-1/4 ± /4
-1/4 ± /4
b) 5x2 −5x−8 = 0
1/2 ± /10
1/2 ± /10
c) -8x2 −5x+4 = 0
-5/16 ± 3/16
-5/16 ± 3/16
d) -7x2 −7x+1 = 0
-1/2 ± /14
-1/2 ± /14
e) -4x2 +3x+6 = 0
3/8 ± /8
3/8 ± /8
f) 3x2 −x−7 = 0
1/6 ± /6
1/6 ± /6
g) 7x2 +6x−8 = 0
-3/7 ± /7
-3/7 ± /7
h) 4x2 −5x−8 = 0
5/8 ± 3/8
5/8 ± 3/8
i) 5x2 +2x−4 = 0
-1/5 ± /5
-1/5 ± /5
j) -9x2 −2x+8 = 0
-1/9 ± /9
-1/9 ± /9