ecuaciones Puras
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8/17/2019 ecuaciones Puras
1/2
GUIA Nº 16(Guía de Ecuaciones Cuadráticas)
Prof:Luis ernán Pacheco Rojas
1. x(2x – 3) –3(5 – x) = 83 Resp: x = ± 7
2. (7 + x)2 + (7 – x)
2= 130 Resp: x = ± 4
3. (3x + 5) (4x + 3) = (5x – 3) (2x – 9) + 80x + 20 Resp: x = ± 4
4. (2x – 3) (3x – 4) – (x – 13) (x – 4) = 40 Resp: x = ± 4
5. (3x – 4) (4x – 3) – (2x – 7) (3x – 2) = 214 Resp: x = ± 6
6. 03
43 ;8
3
822
=!=
!
x
x
x
Resp: ±4 Resp: ±3
2
7. 54
4
2
6 22
=
+
!
! x x
Resp: x = ± 6
8. ;2
735
+
!
=
!
x
x
x
x
35
2
17
54
!
+
=
!
+
x
x
x
x
Resp: x = ± 1 Resp: x = ± 1
9. 122=
!
+
+ x
x
x
x
Resp: x = ± 2i
10.4
40
2
2
2
22!
=
+
!+
!
+
x x
x
x
x Resp: 4 ! –4
11.dxc
d cx
bxa
bax
+
+
=
+
+
Resp: 1 y –1
12. S=" r 2; calcular r. Resp:
!
S
13. S = 4" r 2; calcular r. Resp:
!
S
2
1
-
8/17/2019 ecuaciones Puras
2/2
14.7
5
837
115
2
2
=
+!
+!
x x
x x
Resp: 1 ! –1
15.3
4
4
1 !=
+
x
x
Resp: 5
16. 219953 2
=!+ x Resp: ± 12
17.4
144
+
+
=!!+
x
x
x x Resp: 5
18.3
82553
+
=!!+
x
x x Resp: ± 5
19. 21010 =!!+ x x Resp: 6
20. 2 x x x 341395 !=!++ Resp: ± 3
21. x x x !
=!!
+ 523255 Resp: 5
