EXO 52
A= -22+(-65+25)
A= -22-40
A= -62
B=+16-40+4
B= -20
c= -28+(-20+8)
C= -28-20+8
C= -40
D= -49-75-5
D= -129
E= +19.2 -2.3-7.7
E= 9.2
F= 150: (-1.2-28.8)
F= 150: (-30)
F= -5
EXO 58
1) b²-4ac=3²-4*2*5= 9-40= -31
2) b²-4ac= 2²-4(-1)(3)= 4+12=16
3) b²-4ac = (-2)²-4*3*2= 4-24=-20
EXO 23
a. 5/6+(-1/3)
5/6+ (-1*2/3*2)
5/6-2/6=3/6=1/2
b. 7/9-(1/27)
(3*7/3*9)-1/27
21/27-1/27=20/21
c. -8/5+23/50
(10*-8/10*5)+23/50
-80/50+23/50=-57/50
d.45/15-7/3
45/15-(5*7/5*3)
45/15-35/15=10/15=2/3
e. 4/11+2
4/11+22/11=26/11
f. 8/-91+(-1*13/7*13)
-8/91-13/91=-21/91
g. 5/2-(-45/4)+2/8
(5*4/8)- (-45*2/8)+2/8
20/8-90/8+2/8=-68/8
h. 4-(-5/49)+(-8/7)
(49*4/49)-(-5/49)+(-8*7/7*7)
196/49+5/49-56/49=145/49
