👤
ANTOINE14YO
Answered

K= 7 - [(2 - a) - ( 2 + a)+9]+ (b - 5)
K=........
L = 15+ [(7 - b) - 9 - (a - 17)] - [ 12 + (9-b) - (6 + 2a)]
L=......
M=9 - [(c + 4) - (3 - b)] +21 - [(17 - c) - (2a + 7)] M=......
Il faut supprimer les parenthèses puis réduire les expressions. Merci d'avance !​

Sagot :

Bonjour,

K= 7 - [(2 - a) - ( 2 + a)+9]+ (b - 5)

K= 7-(2-a-2-a +9) +b -5

=  7-2+a+2+a -9 +b -

= 2a+b -2

L = 15+ [(7 - b) - 9 - (a - 17)] - [ 12 + (9-b) - (6 + 2a)]

L=15 +( 7-b -a +17) -(12 +9-b -6 -2a)

= 15 + 7-b -a +17 -12 -9+b +6 +2a

=  a +24

M=9 - [(c + 4) - (3 - b)] +21 - [(17 - c) - (2a + 7)]

M= 9 -(c +4 -3+b) +21 -( 17-c -2a -7)

=     9 -c -4 +3-b +21 -17+c +2a +7

= 2a -b  +19

VINS

bonjour

K= 7 - [(2 - a) - ( 2 + a)+9]+ (b - 5)

K= 7 - [2 - a - 2 - a ) + 9 ] + b - 5

K =  7 - (- 2 a) + 9 + b - 5

K = 7 + 2 a + 9 + b - 5

K = 2 a + b + 11

L = 15+ [(7 - b) - 9 - (a - 17)] - [ 12 + (9-b) - (6 + 2a)]

L=  15 + [ 7 - b - 9 - a + 17 ] - [ 12 + 9 - b - 6 - 2 a]

L = 15 + 7 - b - 9 - a + 17 - 12 - 9 + b + 6 + 2 a

L =  a + 15

M=9 - [(c + 4) - (3 - b)] +21 - [(17 - c) - (2a + 7)]

M = 9 - [ c + 4 - 3 + b )] + 21 - [ 17 - c - 2 a - 7)]

M = 9 - ( c + b + 1 ) + 21 - ( - 2 a - c + 10 )

M = 9 - c - b - 1 + 21 + 2 a + c - 10

M = 2 a - b + 19

Other Questions

© 2024 IDNLearn. All rights reserved.