1001 Algebra Problems.PDF

• RADICAL EXPRESSIONS AND QUADRATIC EQUATIONS–

617.Solve: 3 x+ 4+ x= 8
a.4 and 15
b. 15
c.–4 and 15
d. 4

618.Solve: (x– 1)^2 + 16 = 0
a. 1  2 i
b. 1  4 i
c.–1 4 i
d.–1 2 i

619.Solve:x^3 = –27
a. 3 i
b.–3
c.–3i
d. 3

620.Solve:x^2 = 225
a. 15 i
b.–15i
c.  15
d.  5  5 

621.Solve:x^3 = – 125
a.–5
b. 5
c. 5 i
d.–5i

622.Solve: (x+ 4)^2 = 81
a.–13
b. 5
c.–13, 5
d.There is no solution.

623.Solve:x^2 + 1 = 0
a.  1
b.–1,–i
c.1,i
d. i

624.Solve:x^2 + 81= 0

a.  9

b.  9 i

c.–9,–9i

d.9,9i

Set 40 (Answers begin on page 221)

Solving quadratic equations using the quadratic formula

is the topic of this problem set.

625.Solve using the quadratic formula:x^2 – 7 = 0

a.  7 i

b. 7

c.i 7 

d. 7 

626.Solve using the quadratic formula: 2x^2 – 1 =0

a. 

b. 

c.  2 

d. i 2 

627.Solve using the quadratic formula: 4x^2 + 3x= 0

a.0,–^34 

b.–^34 

c.–^43 

d.^34 

628.Solve using the quadratic formula: 5x^2 + 20x= 0

a.–4

b.0,4

c.4,–4

d.0,–4

i^2 

2

^2 

2