Chapter 4 questions

Question 1

f(x) = -3x^2 -9x + 2

Answer 1

v = (-3/2, 35/4)

Question 2

f(x) = 4x^2 - 6x - 3

Answer 2

V = (0.75, -5.25)

Question 3

f(x) = 2x^2 + 11x

Answer 3

V = (-11/4 , -121/8)

Question 4

f(x) = 3 + 3x^2 + 2x

Answer 4

V = (-1/3, 8/3)

Question 5

x^2 = 5x

Answer 5

x = 5, x = 0

Question 6

2x^2 -3x - 15 = 4

Answer 6

x = 2,3 x= 3,4

Question 7

-2x + 12 = x^2 +16

Answer 7

x= (-2,-3) , x= (0,1) No real solution

Question 8

x^2 = 64

Answer 8

x = +-8

Question 9

solve by factoring 15x^2 -8x +1 =0

Answer 9

x = 1/3, x = 1/5

Question 10

Solve by factoring 4x^2 +29x +30 = 0

Answer 10

x = -6, x = -5/4

Question 11

Solve by factoring 3x^2 + 12x - 36 = 0

Answer 11

x = -6, x = 2

Question 12

simplify √-121

Answer 12

i11

Question 13

simplify i^11

Answer 13

-1i

Question 14

5/2+4i

Answer 14

1-2i/2

Question 15

i^40

Answer 15

1

Question 16

6x^2 + 180 = 0

Answer 16

+- 3i√2

Question 17

4x^2 + 32 = 0

Question 18

6/4+3i

Answer 18

24-18i/25

Question 19

(3 + 2i) (-2 + 4i)

Answer 19

-14 +8i

Question 20

(4 - 8i) - (3 - 6i)

Answer 20

1 - 2i