Algebra Demystified 2nd Ed

Chapter 10 QuadratiC EQuations 359

3. 001014 0130

100001014 013 1000

2

2

...

...(

xx

xx

++=

()++= ))

()()

xx

xx

xx

(^214130)
13 10
13 010
++=
++=
+= +=
−− 13 113 11
13 1
−−
xx=− =−

4. −+−=

−− +−=−

−

01 11 28 0

10 01 11 28 100

2

2

2

...

...()

xx

xx

x

()

111 28 0

740

70 40

x

xx

xx

+=

−−=

−= −=

()()

++ 77    ++

==

44

xx 74        

5.^1
5

1

5

60

51

5

1

5

650

30 0

6

2

2

2

xx

xx

xx

x

+−=

 +−







=

+− =

+

()

())(x )

xx

−=

+= −=

50

60 50

−− ++

=−

66 55

x 6 x= 5

6. 1

6

2

3

16

3

0

61

6

2

3

16

3

60

432

2

2

2

xx

xx

xx

−−=

 −−







=

−−=

()

00

840

80 40

()xx()

xx

−+=

−= +=

++ −−

==

88 44

xx 8 −− 4