Practice
Solve for x.a) 7x2 +7x−5 = 0
-1/2 ± 3/14
-1/2 ± 3/14
b) -2x2 −8x−4 = 0
-2 ±
-2 ±
c) -9x2 −x+6 = 0
-1/18 ± /18
-1/18 ± /18
d) 6x2 −8x−1 = 0
2/3 ± /6
2/3 ± /6
e) 9x2 −4x−9 = 0
2/9 ± /9
2/9 ± /9
f) 2x2 +8x−1 = 0
-2 ± 3/2
-2 ± 3/2
g) -8x2 −2x+5 = 0
-1/8 ± /8
-1/8 ± /8
h) -5x2 +x+5 = 0
1/10 ± /10
1/10 ± /10
i) 1x2 +5x−5 = 0
-5/2 ± 3/2
-5/2 ± 3/2
j) -3x2 +6x+5 = 0
1 ± 2/3
1 ± 2/3