Algebra Demystified 2nd Ed

Chapter 10 QuadratiC EQuations 353

2. xx
   xx
   xx

(^27120)
340
30 40
33
++=
++=
+= +=
−− −
()()
     444
34
−
xx=− =−

3. xx

xx

xx

x

2

2

815

15 15

8150

350

30

+=−

++

++=

++=

+=

()()

xx

xx

+=

−− −−

=− =−

50

33 55

35

4. xx

xx

xx

xx

2

2

10 21

21 21

10 21 0

370

30 7

−=−

++

−+=

−−=

−= −

()()

==

++ ++

==

0

33 77

37

xx

5. 320

32 10

32010

22 11

3

xx^2

xx

xx

x

−−=

+−=

+= −=

−− ++

=

()()

−−=

=−

21

2

3

x

x

6. 485
   55
   4850
   150
   21025

2

2

xx

xx

xx

xx

−=

−−

−−=

+−=

+= −

(2 )(2 )

==

−− ++

=− =

=− =

0

11 55

21 25

1

2

5

2

xx

xx