MATEMATICAS ETAPA3 PAG.102

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

...