Practice
Solve for x.a) 1x2 +7x−5 = 0
-7/2 ± /2
-7/2 ± /2
b) -7x2 −2x+7 = 0
-1/7 ± 5/7
-1/7 ± 5/7
c) -1x2 +6x+9 = 0
3 ± 3
3 ± 3
d) 5x2 −5x−9 = 0
1/2 ± /10
1/2 ± /10
e) 6x2 −3x−7 = 0
1/4 ± /12
1/4 ± /12
f) 2x2 +9x+5 = 0
-9/4 ± /4
-9/4 ± /4
g) -3x2 +x+1 = 0
1/6 ± /6
1/6 ± /6
h) -3x2 −9x+1 = 0
-3/2 ± /6
-3/2 ± /6
i) 4x2 −8x−9 = 0
1 ± /2
1 ± /2
j) -6x2 +x+8 = 0
1/12 ± /12
1/12 ± /12
