MATEMATICAS ETAPA3 PAG.102
Enviado por maru1672 • 9 de Noviembre de 2013 • 399 Palabras (2 Páginas) • 238 Visitas
MATEMATICAS
PORTAFOLIO ETAPA 3
A) EVALUA X-9/X+3
X=6 X= -5 X=8 6-9/6+3=-3/9
-5-9/-5+3 = -14/-2
8-9/8+3 = -1/11
B) EVALUA X-10/X+4
X=3
X= -5
X= -2
3-10/3+4= -7/7
-5-10/ -5+4 = -15/-1
-2-10/-2+4 = -12/2
C) EVALUA 6X+9/ X-6
X=6
X= -3
X= 4
3(6)+9/6-6 = 45/0
6(-3)=9/-3-6= 9/-9
6(4)+9/4-6+ 37/-2
2 2
E)X - 4X - 2 / X + 5X + 6
X=4
X= -3
X= 0
(4)(4) - 4(4) - 2 / (4)(4) + 5 (4) + 6 = -2/42
(-3)(-3) - 4(-3) -2/ (-3)(-3) + 5(-3) +6 = 19/0
X=0 = -2/ 6
2 2
F)EVALUA X + 9X + 8 / X + 12X + 20
X= 4
X= 5
X= 0
(4)(4)+9(4)+8 / (4)(4)+12(4)+20 = 60/ 84
(-5)(-5)=9(-5)+8 / (-5)(-5)+12(-5)+20 = 12/60
X=0 = 8/20
SIMPLIFICANDO EXPRESIONES
2 2
X- 4X-21/ X +5X+6 = (X+3)(X-7) / (X+3)(X+2) = X-7/X+2
2 2
X + 3X-18 / X + 9X +18 = X-3/X+3
9-3/3-9= -1
2 2
X - 2X - 35 / X + 11+30+ X-7/ X+6
2 2
X -2X -35 / X +11 +30 = X-7/X+6
2
X - 5X - 3/ 2X -3X- 2 = X-3/X-2
2 2
X-9/X + 5X +9 = X-3/ X+2
2 2
10X -19X + 6/ 10X -21X +9 = 5X-2/5X-3
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