ultima tarea

1) (-2)(3)(-4)(5)(-6)(7)=
(3)(5)(7)=105
(-2)(-4)(-6)=-48
(105)(-48)=-5040

2) 5+8-9+12-45+65-87+23+54=
5+8+12+65+23+54=167
-9-45-87=141
167-141=26

3) (2/4)(3/5)(6/8)(-7/9)=
(2/4)(3/5)=(6/20)(6/8)=(36/160)(-7/9)=-252/1440=-0.175

4) (2/7)+(3/9)+5-6-8+45=
2/7+3/9=39/63
45+5=50
-6-8=-14
50-14=36
39/63+36/1=2307/63
2307/63=36.61

Escribir el número decimal de:
a) (37/65)
0.56
b) (13/9)
1.44
c) (11/24)
0.45
d) (25/7)
3.57

Encontrar el valor de X
a) 4X + 32 - (5/4) = 16 + (3/5) -12x
4X+12X+32-(5/4)=16+(3/5)
4X+12X=16-32+(3/5)+(5/4)
16X=-16+(13/20)
16X=-16+0.65
16X=-16.65
X=-16.65/16
X=1.040625

b) 28 - 77 + 44X = (4/6) - (18/4) -25X
28-77+44X+25X=(4/6)-(18/4)
-49+69X=(92/24)
69X=3.83+49
69X=52.83
X=52.83/69
X=0.765

c) 38X + 456 - (28/3) =
38X=-456+9.3
X=446.7/38
X=11.75

Sumas y Restas
(2x + 23 -18) + (-12 + 43X) =
2X+23-18-12+43X=0
2X+43X+23-18+12=0
45X+17

((-3/8) - (11/5) + 23x) - ((18/4)x + (45/5) -12) =
(-3/8)-(11/5)+23X-(18/4)X+45/5-12=
(-73/40)+(45/5)+23X-4.5X-12
1435/200+18.5X-12
7.175-12+18.5X
-4.825+18.5X

Multiplicaciones
(x + 2) (x -3) =
X2-3X+2X-6
X2-X-6

(2X - 16) (3X - 2Y+15) =
6X2-4XY+30X-48X+32Y-240
6X2-4XY-18X+32Y-240

(-x) (45xyz) =
-45X2YZ

(5X + 25 ) (12X +4) =
60X2+20X+300X+100
60X2+320X+100

(6x + 3)(6x +3) =
(6X+3)2
36X2+18X+9